The area of a parallelogram is 85 square meters, if the base and height are doubled, what is its area in square meters?
一个平行四边形的面积是85平方米，如果底和高都扩大2倍，它的面积是多少平方米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">85 * 4</gadget>
<output>340</output>

<result>340</result>