In the art class, Mingming divided a piece of rectangular colored paper with a length of 20 cm and a width of 15 cm into two identical trapezoids. What is the area of each trapezoid?
美术课上，明明把一张长20厘米，宽15厘米的长方形彩纸分成了两个完全相同的梯形，每个梯形的面积是多少．
<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">20 * (15/2)</gadget>
<output>150</output>

<result>150</result>