triangle and a parallelogram have the same base and height. The area of the triangle is 60 square meters. What is the area of the parallelogram?
一个三角形与平行四边形等底等高，三角形的面积是60平方米，平行四边形面积是多少．
<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<result>120</result>