按回车键，公式运算并得到结果。

Press Enter. The formula will be calculated.

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现在，这台拥有图标式计算器终于拥有了这一功能。一部集合了公式运算，图标，倾斜领域和欧拉法演算工具的计算器终于诞生了。

Eventually, this application will be a sort of graphing calculator that will include expression evaluation, graphing, and calculus tools like slope fields and Euler's method.

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编程语言是一种用来表达运算的公式语言。

Programming languages are formal languages that have been designed to express computations.

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