If the area of a triangle is 60 square centimeters, what is the area of a parallelogram with the same base and the same height as it?
如果一个三角形的面积是60平方厘米，那么与它同底等高的平行四边形的面积是多少．
<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<result>120</result>