A parallelogram, the two adjacent sides are 4 cm and 6 cm long, and the height of one of the sides is 5 cm long, what is the area of the parallelogram in square centimeters?
一个平行四边形，相邻的两条边分别长4厘米和6厘米，测得其中一条边上的高长5厘米，这个平行四边形的面积是多少平方厘米．
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>