trapezoid can be divided into a parallelogram and a triangle, the two figures have the same base and height, if the area of the triangle is 12 square centimeters. What is the area of the trapezoid in square centimetres?
一个梯形可以分为一个平行四边形和一个三角形，两个图形等底等高，如果三角形面积是12平方厘米．那么梯形面积是多少平方厘米．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 + 12</gadget>
<output>36</output>

<result>36</result>