rectangular flower bed is 20 meters long and 5 times its width. How big is this rectangular flower bed?
一个长方形的花坛，长是20米，是宽的5倍，这个长方形的花坛有多大？
<gadget id="calculator">20 / 5</gadget>
<output>4</output>

<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<result>80</result>