To paint a room that is 9 meters long, 4 meters wide, and 3 meters high, how many square meters is the area to be painted? (door and window area is 24 square meters)
要粉刷一间长9米，宽4米，高3米的房间，要粉刷的面积是多少平方米？(门窗面积是24平方米)
<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">27 + 12</gadget>
<output>39</output>

<gadget id="calculator">39 * 2</gadget>
<output>78</output>

<gadget id="calculator">78 - 24</gadget>
<output>54</output>

<gadget id="calculator">36 + 54</gadget>
<output>90</output>

<result>90</result>