A classroom with a flat top is 10 meters long, 6 meters wide, and 3 meters high. The classroom doors, windows and blackboards have a total area of 30 square meters. If the top and four walls of the classroom are to be painted, how many square meters is the painted area?
一间平顶教室长10米，宽6米，高3米，教室门窗和黑板的面积一共有30平方米，要粉刷教室的顶面和四面墙壁，粉刷的面积有多少平方米？
<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">10 * 3 * 2</gadget>
<output>60</output>

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

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<gadget id="calculator">60 + 60 + 6</gadget>
<output>126</output>

<result>126</result>