To paint a classroom with a length of 8 meters, a width of 6 meters and a height of 4 meters, the area of doors and windows is 11.4 square meters. 5 yuan of paint is needed per square meter, how much is the minimum cost to buy paint to paint this classroom?
粉刷一个长8米、宽6米、高4米的教室，扣除门窗面积11.4平方米．每平方米需5元涂料，粉刷这个教室买涂料至少要花费多少元钱？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

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

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<gadget id="calculator">48 + 24 + 32</gadget>
<output>104</output>

<gadget id="calculator">104 * 2</gadget>
<output>208</output>

<gadget id="calculator">208 - 48 - 11.4</gadget>
<output>148.6</output>

<gadget id="calculator">148.6 * 5</gadget>
<output>743</output>

<result>743</result>