A triangle and a parallelogram have the same base and the same area. If the height of the parallelogram is 10 cm, what is the height of the triangle in cm?
一个三角形和一个平行四边形底相等，面积也相等．平行四边形的高是10厘米，那么，三角形的高应是多少厘米．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

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

<result>20</result>