diff --git a/package-lock.json b/package-lock.json
index 11d493a..d42c056 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "resource-graph-sim",
       "version": "0.1.0",
       "dependencies": {
+        "break_eternity.js": "^2.1.3",
         "elkjs": "^0.12.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1"
@@ -1231,6 +1232,12 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/break_eternity.js": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/break_eternity.js/-/break_eternity.js-2.1.3.tgz",
+      "integrity": "sha512-4tg4j0wc0lhaYAnOHubN5mAyHbhMfUI7adQLO8l/loKqtylZ/kHWp8WYqG2EC0TinSesKvpCi3XeVFcKRUBJsQ==",
+      "license": "MIT"
+    },
     "node_modules/browserslist": {
       "version": "4.28.8",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.8.tgz",
diff --git a/package.json b/package.json
index cfe696d..c72b74f 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "break_eternity.js": "^2.1.3",
     "elkjs": "^0.12.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1"
diff --git a/src/components/NodeCard.tsx b/src/components/NodeCard.tsx
index 481e3ac..e9432ee 100644
--- a/src/components/NodeCard.tsx
+++ b/src/components/NodeCard.tsx
@@ -63,7 +63,7 @@ const NodeCard = forwardRef<HTMLDivElement, Props>(function NodeCard({ node2d, s
             <div>{name}</div>
             {
               Object.entries(storage)
-                .map(([rt, v]) => `${ResourceDescriptions[rt as Resource].icon}${v}`).join(' ')
+                .map(([rt, v]) => `${ResourceDescriptions[rt as Resource].icon}${v.toStringWithDecimalPlaces(4)}`).join(' ')
             }
           </div>
         ))
diff --git a/src/components/Topbar.tsx b/src/components/Topbar.tsx
index 6d6b0f7..23e8390 100644
--- a/src/components/Topbar.tsx
+++ b/src/components/Topbar.tsx
@@ -1,5 +1,7 @@
+import type Decimal from 'break_eternity.js';
+
 interface Props {
-  time: number;
+  time: Decimal;
   onTick: () => void;
   onReset: () => void;
   onInitialize: () => void;
@@ -13,7 +15,7 @@ export default function Topbar({ time, onTick, onReset, onInitialize }: Props) {
         <span>детерминированная тиковая симуляция</span>
       </h1>
       <div className="tick-counter">
-        Время <b>{time}</b>
+        Время <b>{time.toStringWithDecimalPlaces(4)}</b>
       </div>
       <div className="spacer" />
       <button className="btn" onClick={onInitialize}>
diff --git a/src/engine/functions/index.ts b/src/engine/functions/index.ts
index 59e3f89..a2f4c05 100644
--- a/src/engine/functions/index.ts
+++ b/src/engine/functions/index.ts
@@ -1,3 +1,4 @@
+import Decimal, { DecimalSource } from "break_eternity.js";
 import { Resource, Resources, SerializedConverter, SerializedNodeBehaviour as SerializedBehaviour, SerializedNodeBehaviour } from "../../types";
 
 export type BehaviourResourcePin = {
@@ -67,15 +68,15 @@ export abstract class Behaviour {
     abstract getDisplayInfo(): BehaviourDisplayInfo;
 
     /** Withdraws up to `amount` of `resource` from this behaviour's storage, returning how much was actually taken. */
-    public take(resource: Resource, amount: number): number {
-        const available = this.storage[resource] ?? 0;
-        const taken = Math.min(available, amount);
-        this.storage[resource] = available - taken;
+    public take(resource: Resource, amount: DecimalSource): Decimal {
+        const available = this.storage[resource] ?? Decimal.dZero;
+        const taken = available.min(amount);
+        this.storage[resource] = available.sub(taken);
         return taken;
     }
 
-    protected give(resource: Resource, amount: number): void {
-        this.storage[resource] = (this.storage[resource] ?? 0) + amount;
+    protected give(resource: Resource, amount: DecimalSource): void {
+        this.storage[resource] = (this.storage[resource] ?? Decimal.dZero).add(amount);
     }
 
     abstract produce(deltaTime: number): void;
@@ -94,17 +95,17 @@ export class Converter extends Behaviour {
 
         this.inputRates = {};
         for (const pin of source.inputs.pins)
-            this.inputRates[pin.resource] = pin.rate;
+            this.inputRates[pin.resource] = new Decimal(pin.rate);
 
         this.outputRates = {};
         for (const pin of source.outputs.pins)
-            this.outputRates[pin.resource] = pin.rate;
+            this.outputRates[pin.resource] = new Decimal(pin.rate);
     }
 
     /** Fills this converter's own storage from its outputs' production rates. */
     public produce(deltaTime: number): void {
         for (const output of this.outputs.pins)
-            this.give(output.resource, (this.outputRates[output.resource] ?? 0) * deltaTime);
+            this.give(output.resource, (this.outputRates[output.resource] ?? Decimal.dZero).mul(deltaTime));
     }
 
     /** Pulls resources into this converter's storage from whatever each input pin is linked to. */
@@ -113,8 +114,8 @@ export class Converter extends Behaviour {
             const source = resolve(input.link.target);
             if (!source)
                 continue;
-            const rate = this.inputRates[input.resource] ?? 0;
-            const taken = source.take(input.link.resource, rate * deltaTime);
+            const rate = this.inputRates[input.resource] ?? Decimal.dZero;
+            const taken = source.take(input.link.resource, rate.mul(deltaTime));
             this.give(input.resource, taken);
         }
     }
diff --git a/src/types/index.ts b/src/types/index.ts
index 77a20eb..51d0318 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -1,9 +1,10 @@
+import Decimal, { DecimalSource } from "break_eternity.js";
 import { Behaviour } from "../engine/functions";
 import { deserializeBehaviour } from "../engine/saveLoad";
 
 export type Resource = 'wood' | 'plank' | 'stone';
 
-export type Resources = Record<Resource, number>;
+export type Resources = Record<Resource, Decimal>;
 
 export type Node = {
     id: string;
@@ -12,11 +13,11 @@ export type Node = {
 }
 
 export class Game {
-    public time: number;
+    public time: Decimal;
     public readonly nodes: Node[];
 
     constructor(source: SerializedGame) {
-        this.time = source.time;
+        this.time = new Decimal(source.time);
         this.nodes = source.nodes.map((node) => ({
             id: node.id,
             name: node.name,
@@ -25,7 +26,7 @@ export class Game {
     }
 
     public tick(deltaTime: number) {
-        this.time += deltaTime;
+        this.time = this.time.add(deltaTime);
 
         const behavioursById = new Map(this.nodes.map((node) => [node.behaviour.id, node.behaviour]));
 
@@ -36,7 +37,7 @@ export class Game {
     }
 
     public reset() {
-        this.time = 0;
+        this.time = Decimal.dZero;
          for (const node of this.nodes)
             node.behaviour.reset();
     }
@@ -49,7 +50,7 @@ export class Game {
 
 export type SerializedConverterInput = {
     resource: Resource;
-    rate: number;
+    rate: DecimalSource;
     link: {
         target: SerializedNodeBehaviour['id'],
         resource: Resource,
@@ -58,7 +59,7 @@ export type SerializedConverterInput = {
 
 export type SerializedConverterOutput = {
     resource: Resource;
-    rate: number;
+    rate: DecimalSource;
 }
 
 export type SerializedConverterInputs = {
@@ -90,6 +91,6 @@ export type SerializedNode = {
 }
 
 export type SerializedGame = {
-    time: number;
+    time: DecimalSource;
     nodes: SerializedNode[];
 }
\ No newline at end of file