Paint a living room. It is known that the living room is 6 meters long, 4 meters wide, and 3 meters high. If the door and window area is 12 square meters, if the paint fee is 3.5 yuan per square meter, how much will it cost to paint the living room?
粉刷一间客厅，已知客厅长6米，宽4米，高3米，扣除门窗面积12平方米，如果每平方米需要花3.5元涂料费，粉刷这间客厅需要花费多少元？
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

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

<gadget id="calculator">4 * 3 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 - 12</gadget>
<output>12</output>

<gadget id="calculator">24 + 36 + 12</gadget>
<output>72</output>

<gadget id="calculator">72 * 3.5</gadget>
<output>252</output>

<result>252</result>