A house is 10 meters long, 8 meters wide, and 3 meters high. The walls and roof need to be painted, and the area of doors and windows is 18 square meters. How many kilograms of paint?
一间房子长10米，宽8米，高3米，要粉刷四壁和房顶，扣除门窗面积18平方米，如果平均每平方米用涂料(1/5)千克，刷这间房子一共用涂料多少千克？
<gadget id="calculator">10 * 8</gadget>
<output>80</output>

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

<gadget id="calculator">8 * 3 * 2</gadget>
<output>48</output>

<gadget id="calculator">48 - 18</gadget>
<output>30</output>

<gadget id="calculator">80 + 60 + 30</gadget>
<output>170</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">170 * (1/5)</gadget>
<output>34</output>

<result>34</result>