Paint the walls around a cuboid room with a length of 15 meters, a width of 8 meters and a height of 4 meters, and deduct the area of doors and windows of 24 square meters. If 1.2 kg of lime is used per square meter, how much lime is used in common?
粉刷一间长15米，宽8米，高4米的长方体房间四周的墙壁，扣除门窗面积24平方米．如果每平方米用石灰1.2千克，共用石灰多少？
<gadget id="calculator">15 * 4</gadget>
<output>60</output>

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

<gadget id="calculator">60 + 32</gadget>
<output>92</output>

<gadget id="calculator">92 * 2 * 1.2</gadget>
<output>220.8</output>

<result>220.8</result>