If the area of a triangle is 72 square centimeters, what is the area of a parallelogram with the same base and height as it?
一个三角形面积是72平方厘米，和它等底等高的平行四边形的面积是多少平方厘米．
<gadget id="calculator">72 * 2</gadget>
<output>144</output>

<result>144</result>