Xiaohua’s room is 4.5M long, 2.3M wide, and 2.8M high. White paint is needed to paint the walls and roof. The doors and windows cover an area of 6 square meters. The average paint used per square meter is 0.4 kg. How many kg of paint is needed in total?
小华的房间长4.5M，宽是2.3M，高2.8M，要用白色涂料粉刷墙壁和屋顶，门窗的面积为6平方米，平均每平方米用涂料0.4千克，一共需要涂料多少千克？
<gadget id="calculator">4.5 * 2.3</gadget>
<output>10.35</output>

<gadget id="calculator">4.5 * 2.8</gadget>
<output>12.6</output>

<gadget id="calculator">2.3 * 2.8</gadget>
<output>6.44</output>

<gadget id="calculator">12.6 + 6.44</gadget>
<output>19.04</output>

<gadget id="calculator">19.04 * 2</gadget>
<output>38.08</output>

<gadget id="calculator">38.08 - 6</gadget>
<output>32.08</output>

<gadget id="calculator">10.35 + 32.08</gadget>
<output>42.43</output>

<gadget id="calculator">42.43 * 0.4</gadget>
<output>16.972</output>

<result>16.972</result>