我们需要计算出项目的总成本。

We need to ___work ___out the total cost of the project.

我必须两次计算出所有的数字，以确保我的账户准确。

I had to ___work ___out all my figures two times to make sure that my accounts were accurate.

你能帮我计算出这道数学题吗？

Can you ___work ___out this math problem for me?