diff --git a/package.json b/package.json
index c99f162..edccd58 100644
--- a/package.json
+++ b/package.json
@@ -26,8 +26,9 @@
     "@eslint/js": "^9.12.0",
     "commitlint": "^19.5.0",
     "eslint": "^9.12.0",
-    "eslint-config-prettier": "^9.1.0",
     "eslint-config-love": "^v87.0.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-config-standard-with-typescript": "^43.0.1",
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-n": "^17.11.1",
     "eslint-plugin-prettier": "^5.2.1",
diff --git a/src/1.Hello_World/FinancialMath.ts b/src/1.Hello_World/FinancialMath.ts
index aa11199..74707bb 100644
--- a/src/1.Hello_World/FinancialMath.ts
+++ b/src/1.Hello_World/FinancialMath.ts
@@ -1,22 +1,26 @@
-import {FixedPointNumber} from '@vechain/sdk-core';
+import { FixedPointNumber } from '@vechain/sdk-core';
 import { BigNumber } from 'bignumber.js';
 
 let x = FixedPointNumber.of(123.456789);
 let y = FixedPointNumber.of('123.456789');
-console.log(`FPN value ${x} from number is ${x.isEqual(y) ? '' : 'not'}equal to ${y} from string.`);
+console.log(
+    `FPN value ${x} from number is ${x.isEqual(y) ? '' : 'not'}equal to ${y} from string.`
+);
 console.log(`Cast FPN value to number is ${x.n}.`);
 console.log(`Cast FPN value to bigint is ${x.bi}.`);
 
 x = FixedPointNumber.of(1);
 y = FixedPointNumber.of(3);
 let r = x.div(y);
-console.log(`FPN value = ${r}; JS value = ${x.n/y.n}; BigNumber value = ${BigNumber(x.n).div(y.n)}.`);
-x = x.dp(80) // must be updated
+console.log(
+    `FPN value = ${r}; JS value = ${x.n / y.n}; BigNumber value = ${BigNumber(x.n).div(y.n)}.`
+);
+x = x.dp(80); // must be updated
 r = x.div(y);
 console.log(`${r}`);
 
-let dp = 20;
-for(let n = 0; n <= 8; n ++) {
+const dp = 20;
+for (let n = 0; n <= 8; n++) {
     x = FixedPointNumber.of(n, BigInt(dp));
     r = x.sqrt();
     console.log(`${n}, ${r};\t${Math.sqrt(n)};\t${BigNumber(n).dp(dp).sqrt()}`);
@@ -28,4 +32,3 @@ for(let n = 0; n <= 8; n ++) {
 //     r = x.sqrt();
 //     console.log(`${n}, ${r};\t${Math.sqrt(n)};\t${BigNumber(n).dp(dp).sqrt()}`);
 // }
-