The school needs to paint the new classrooms. It is known that the length of the classroom is 8 meters, the width is 5 meters, the height is 3.5 meters, and the area excluding doors and windows is 12.5 square meters. If paint costs 4 yuan per square meter, how much does it cost to paint this classroom?
学校要粉刷新教室．已知教室的长是8米，宽是5米，高是3.5米，除去门窗的面积是12.5平方米．如果每平方米需要花4元涂料费，那么粉刷这个教室需要花费多少元？
<gadget id="calculator">131 - 12.5</gadget>
<output>118.5</output>

<gadget id="calculator">118.5 * 4</gadget>
<output>474</output>

<result>474</result>