If the base and corresponding height of a triangle are 5m and 4m respectively, what is the area of a parallelogram with the same base and the same height?
一个三角形的底与对应的高分别是5m和4m，那么与等底等高的平行四边形的面积是多少㎡．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">5 * 2 * 2</gadget>
<output>20</output>

<result>20</result>