操作方法
鼠标点选到C1的单元格中，输入公式“=A1*B1”，如图所示： Mouse click to the cell C1, enter the formula "= A1 * B1", as shown:
从第二排单元格中开始输入你需要求积的数字，如图所示： From the second row of the cell start typing your request plot numbers, as shown:
将鼠标选中“C1”，然后当光标变成十字架形状的时候一直网下拉，如图所示： The mouse to select the "C1", and then when the cursor changes to a cross shape when the network has been pulled down, as shown:
放开鼠标，你就会发现，所有自动求积的计算就都已经完成了，如图所示： Release the mouse, you will find that all calculations automatically Quadrature on have been completed, as shown: