Our classroom is 12 meters long, 8 meters wide, and 4 meters high. To paint the roof and four walls, 1.5 kilograms of paint is used per square meter. After deducting the 22 square meters of doors and windows, how many kilograms of paint should be prepared to paint this classroom?
我们的教室长12米，宽8米，高4米，粉刷其屋顶及四面墙壁，每平方米用涂料1.5千克，扣除门窗面积22平方米，粉刷这间教室要准备多少千克的涂料？
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

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

<gadget id="calculator">4 * 12</gadget>
<output>48</output>

<gadget id="calculator">96 + 32 + 48</gadget>
<output>176</output>

<gadget id="calculator">176 * 2</gadget>
<output>352</output>

<gadget id="calculator">352 - 96 - 22</gadget>
<output>234</output>

<gadget id="calculator">234 * 1.5</gadget>
<output>351</output>

<result>351</result>