Xiaohua's room is 4.5M long, 2/3 wide and 2.8M high. The walls and roof need to be painted with white paint. How many kilograms of paint?
小华的房间长4.5M，宽是长的(2/3)，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">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4.5 * 4.5 * (2/3)</gadget>
<output>13.5</output>

<gadget id="calculator">4.5 * 2.8 * 2</gadget>
<output>25.2</output>

<gadget id="calculator">4.5 * (2/3) * 2.8 * 2</gadget>
<output>16.8</output>

<gadget id="calculator">16.8 - 12</gadget>
<output>4.8</output>

<gadget id="calculator">13.5 + 25.2 + 4.8</gadget>
<output>43.5</output>

<gadget id="calculator">43.5 * 0.4</gadget>
<output>17.4</output>

<result>17.4</result>