A classroom is 10 meters long, 8 meters wide, and 5 meters high. The area excluding doors, windows and blackboards is 26 square meters. If the walls and ceiling of the classroom are to be painted, if 0.3 kilograms of paint is used per square meter, how many kilograms of paint are needed in total?
一间教室长10米，宽8米，高5米，除去门窗和黑板的面积26平方米，要粉刷教室的四壁和顶棚，如果每平米用涂料0.3千克，共需涂料多少千克？
<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">80 + 40 + 50</gadget>
<output>170</output>

<gadget id="calculator">170 * 2</gadget>
<output>340</output>

<gadget id="calculator">340 - 80 - 26</gadget>
<output>234</output>

<gadget id="calculator">234 * 0.3</gadget>
<output>70.2</output>

<result>70.2</result>