The area of a parallelogram is 5 square centimeters, if the base and height are enlarged to 4 times of the original, what is the area?
一个平行四边形的面积是5平方厘米，如果底与高都扩大到原来的4倍，面积是多少．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">5 * 16</gadget>
<output>80</output>

<result>80</result>