The school needs to paint the new classrooms. It is known that the length of the classroom is 8m, the width is 5m, and the height is 3m. The area after deducting doors and windows is 20.6 square meters. How many square meters is the painted area?
学校要粉刷新教室．已知教室的长是8m，宽是5m，高是3m．扣除门窗的面积是20.6平方米．粉刷面积是多少平方米？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 3 * 2</gadget>
<output>48</output>

<gadget id="calculator">5 * 3 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 - 20.6</gadget>
<output>9.4</output>

<gadget id="calculator">40 + 48 + 9.4</gadget>
<output>97.4</output>

<result>97.4</result>