Paint a cuboid classroom with a length of 8 meters, a width of 6 meters, and a height of 3.5 meters, and the area of doors and windows is 27 square meters. It is known that 0.3 kg of paint is used per square meter. How many kilograms of paint will be used in this classroom?
粉刷一间长8米、宽6米，高3.5米的长方体教室，除去门窗面积27平方米．已知每平方米用涂料0.3千克．这间教室一共要用多少千克涂料？
<gadget id="calculator">48 + 28 + 21</gadget>
<output>97</output>

<gadget id="calculator">97 * 2</gadget>
<output>194</output>

<gadget id="calculator">194 - 48 - 27</gadget>
<output>119</output>

<gadget id="calculator">119 * 0.3</gadget>
<output>35.7</output>

<result>35.7</result>