A classroom is 12 meters long, 5 meters wide, and 4 meters high. Now paint it, remove the doors and windows for 35.2 square meters, and use 0.2 kilograms of paint per square meter on average. How many kilograms will be used?
一间教室长为12米，宽为5米，高为4米，现在给它刷漆，除去门窗35.2平方米不刷平均每平方米用漆0.2千克一共用去多少千克？
<gadget id="calculator">12 * 5</gadget>
<output>60</output>

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

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">48 + 20</gadget>
<output>68</output>

<gadget id="calculator">68 * 2</gadget>
<output>136</output>

<gadget id="calculator">136 - 35.2</gadget>
<output>100.8</output>

<gadget id="calculator">60 + 100.8</gadget>
<output>160.8</output>

<gadget id="calculator">160.8 * 0.2</gadget>
<output>32.16</output>

<result>32.16</result>