The phrase "similar formula" refers to a set of rules, procedures or steps that are used in solving problems or completing tasks. These formulas may vary slightly depending on the specific context but they all follow a similar pattern and achieve the same result. The term is commonly used in mathematics where equations have a standard form with variables representing unknown values, and by following the "similar formula" rules, one can solve for those values. It's also used in other fields such as science or engineering to describe methods that are based on established principles but may be adapted to specific conditions.