用户可以通过鼠标依次输入参加计算的数值，进行加、减、乘、除等混合运算，还有平方根、倒数、百分数等运算功能，方便日常生活。,Users can enter to participate in the mouse followed by the numerical calculation, to add, subtract, multiply, divide operations such as mixing, as well as the square root, reciprocal, such