The area of a parallelogram is 90cm**2, if its base and height are doubled, what is its area in cm**2?
一个平行四边形的面积是90cm**2，若它的底和高都扩大2倍，它的面积是多少CM**2．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">90 * 4</gadget>
<output>360</output>

<result>360</result>