calculate|calculating

在某个阶段，我们需要计算项目何时完成。

At some stage we need to ___calculate when the project will be finished.

我用计算器算出了这道数学题的答案。

I used a calculator to ___calculate the answer to this math problem.

科学家正在非常精确地计算卫星的轨道。

The scientist is ___calculating the trajectory of the satellite with great precision.