Uncles of the People's Liberation Army built temporary classrooms with thermal insulation materials for children in the disaster area. A classroom is 8m long, 6m wide, and 4m high. The door and window area of each classroom is 2.4m**2, and the roof is made of other materials. To build five such classrooms, how many square meters of insulation materials are needed in total?
解放军叔叔为灾区的孩子用保温材料搭建临时教室．一个教室的长8m，宽6m，高是4m．每个教室的门窗面积是2.4m**2，顶部用其他材料，搭建五个这样的教室，共需保温材料多少平方米？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">32 + 24</gadget>
<output>56</output>

<gadget id="calculator">56 * 2</gadget>
<output>112</output>

<gadget id="calculator">112 - 2.4</gadget>
<output>109.6</output>

<gadget id="calculator">109.6 * 5</gadget>
<output>548</output>

<result>548</result>