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// Install long.js library using npm: npm install long
// Require the library
const Long = require('long');
// Create a 64-bit integer value
const int64Value = Long.fromString('9223372036854775807');
// Perform operations with the 64-bit integer
const result = int64Value.add(42);
// Convert the result back to a regular JavaScript number
const resultNumber = result.toNumber();
console.log(resultNumber); // Output: 9223372036854775849