right-angled triangle with an area of 300 square meters has one right-angled side 20 meters and the other right-angled side in meters.
一个面积是300平方米的直角三角形，一条直角边是20米，另一条直角边是多少米．
<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">300 * (1/10)</gadget>
<output>30</output>

<result>30</result>