The school needs to paint the new classrooms. It is known that the classroom is 8 meters long, 6 meters wide, and 3 meters high. Deduct the door and window area of 12 square meters. If the paint fee is 6.5 yuan per square meter, how much will it cost to paint this classroom?
学校要粉刷新教室．已知教室长8米，宽6米，高3米．扣除门窗面积12平方米．如果每平方米需要6.5元涂料费，粉刷这个教室需要花费多少元？
<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<gadget id="calculator">6 * 3 * 2</gadget>
<output>36</output>

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

<gadget id="calculator">48 - 12</gadget>
<output>36</output>

<gadget id="calculator">48 + 36 + 36</gadget>
<output>120</output>

<gadget id="calculator">120 * 6.5</gadget>
<output>780</output>

<result>780</result>