A classroom is 8m long, 5m wide, and 3.6m high. To paint this classroom, the area of doors, windows and blackboards is 15.6m**2. How many square meters is the painted area?
一间教室长8m、宽5m、高3.6m，粉刷这间教室，除去门窗和黑板面积15.6m**2，粉刷的面积是多少平方米？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 3.6</gadget>
<output>28.8</output>

<gadget id="calculator">5 * 3.6</gadget>
<output>18</output>

<gadget id="calculator">28.8 + 18</gadget>
<output>46.8</output>

<gadget id="calculator">46.8 * 2</gadget>
<output>93.6</output>

<gadget id="calculator">93.6 - 15.6</gadget>
<output>78</output>

<gadget id="calculator">40 + 78</gadget>
<output>118</output>

<result>118</result>