If the length of a rectangle is 40 cm and the width is 25 cm, what is its area in square centimeters?
一个长方形的长是40厘米，宽是25厘米，它的面积是多少平方厘米．
<gadget id="calculator">40 * 25</gadget>
<output>1_000</output>

<result>1_000</result>