If the base of a triangle is 40 meters long and the height is 12 meters, what is the area of a parallelogram with the same base and height?
一块三角形地的底边长是40米，高是12米，与它等底等高的平行四边形地的面积是多少．
<gadget id="calculator">40 * 12</gadget>
<output>480</output>

<result>480</result>