She can deal with complicated numbers in her head, but we lesser mortals need calculators!

她可以心算复杂的数字，而我们常人就需要计算器！

The regulations specify that calculators may not be used in the examination.

考试规则明确规定考试时不得使用计算器。

We don't have 450 calculators for you.

我们不会为你们准备450个计算器的。

Thank God for calculators!

感谢上帝！

Both BC and dc are command-line calculators.

bc和dc都是命令行计算器。