triangle and a parallelogram have the same base and the same area, the height of the triangle is 20cm, what is the height of the parallelogram in cm
一个三角形和一个平行四边形的底相等，面积也相等，三角形的高是20cm，平行四边形的高是多少cm
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 * (1/2)</gadget>
<output>10</output>

<result>10</result>