A classroom is 9 meters long, 6 meters wide, 3 meters high, and has doors and windows of 13.5 square meters. It is necessary to paint the surroundings and the roof of the classroom, and pay 10.5 yuan per square meter for materials and wages. How much will it cost in total?
一间教室，长9米，款6米，高3米，门窗13.5平方米．要把教室四周和屋顶粉刷一遍，每平方米付材料和工资费用10.5元，一共要付多少元？
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">9 * 3 * 2</gadget>
<output>54</output>

<gadget id="calculator">6 * 3 * 2</gadget>
<output>36</output>

<gadget id="calculator">54 + 54 + 36</gadget>
<output>144</output>

<gadget id="calculator">144 - 13.5</gadget>
<output>130.5</output>

<gadget id="calculator">130.5 * 10.5</gadget>
<output>1_370.25</output>

<result>1_370.25</result>