the process of using information you already have and adding, taking away, multiplying, or dividing numbers to judge the number or amount of something

The calculations that you did/made contained a few inaccuracies. 你的计算有几处不准确。

careful planning to control a situation for your own advantage in a way that is slightly unpleasant and causes people not to trust you

There's an element of calculation in his behaviour that makes me distrust him. 他的行为透着些许算计，让我不信任他。