How Important Are Significant Figures in Blockchain Data Analysis and Smart Contract Calculations?

While working on a Web3 project, I realized that numerical precision can drastically affect smart contract outcomes, especially when dealing with token decimals or gas calculations. Even small rounding errors can lead to major discrepancies in results.

To better understand precision handling, I started using a~~ Significant Figures Rounder~~
to verify numerical accuracy in my computations. It’s been useful for double-checking results when writing or testing smart contracts.

I’m curious — how do other Web3 developers handle precision in calculations? Do you rely on libraries, manual checks, or mathematical tools to ensure data accuracy? Let’s discuss best practices for maintaining precision in blockchain and decentralized app development.