The school needs to repaint the classroom. It is known that the length of the classroom is 10m, the width is 8m, the height is 3.5m, and the area of doors and windows is 16.8 square meters. If paint costs 10 yuan per square meter, how much will it cost to paint this classroom?
学校要粉刷新教室，已知教室的长是10m，宽是8m，高是3.5m，门窗的面积是16.8平方米．如果每平方米需要花10元涂料费，粉刷这个教室需要花费多少元？
<gadget id="calculator">206 - 16.8</gadget>
<output>189.2</output>

<gadget id="calculator">189.2 * 10</gadget>
<output>1_892</output>

<result>1_892</result>