There is a rectangle with an area of 40 square centimeters, a length of 8 centimeters, and a width of 8 centimeters.
有一个长方形的面积是40平方厘米，长8厘米，宽是多少厘米．
<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<result>5</result>