Xiao Ming uses a square piece of paper with an area unit of 1 square centimeter to measure the area of a rectangular wooden board. There are 20 pieces along the length and 16 pieces along the width. What is the area of this rectangular plank in square centimeters?
小明用面积单位为1平方厘米的正方形纸片测量一个长方形木板的面积．沿着长要摆20个，沿着宽要摆16个，这张长方形木板的面积是多少平方厘米．
<gadget id="calculator">20 * 16 * 1</gadget>
<output>320</output>

<result>320</result>