它还允许您对两个统计数据执行诸如加、减、乘、除等数学运算。
It also lets you perform mathematical operations like addition, subtraction, division, and multiplication on two statistics.
零加任一数仍等于该数，零乘任一数则等于零。
Zero plus any number gives that number again, and zero times any number gives zero.
加、乘、余弦等的相互组合能产生任何我们可以想到的数学方程。
Add, multiply, cosine, etc., can be combined to generate any mathematical equation we can think of.
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