==Calculation==When multiplying several quantities, the number of significant figures in the final answer is the number of significant figures in the factor having the least number of significant figures (the least precise).
* تمام صفرها در اول* ارقامی که معنی عدد را حمل نمی کنن (مانند ارقام که در حساب بیشتر از ارقام داده شده می‌شود)* https://en.wikipedia.org/wiki/Significant_figures* Significant Figures Calculator* Significant Figures Video by Khan academy