The rear window glass of a car has a trapezoidal shape, the upper base is 11 decimeters, the lower base is 2 decimeters longer than the upper base, and the height is 6 decimeters. If the glass is 12.5 yuan per square decimeter, how much should it cost?
一辆汽车的后车窗玻璃是梯形形状，上底11分米，下底比上底长2分米，高是6分米，如果每平方分米玻璃12.5元，应需要多少元钱？
<gadget id="calculator">11 + 2 + 11</gadget>
<output>24</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">12.5 * 72</gadget>
<output>900</output>

<result>900</result>