Xiaohua's room is 4 meters long, 3 meters wide, and 3 meters high. Excluding the doors and windows, the area is 5 square meters. The walls and roof of the room must be painted. The average lime used per square meter is 0.2 kilograms. How many kilograms of lime does this room need?
小华的房间长4米，宽3米，高3米，除去门窗面积5平方米，房间的墙壁和房顶都要粉刷，平均每平方米用石灰0.2千克，这个房间一共要多少千克石灰？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">4 * 3 * 2</gadget>
<output>24</output>

<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<gadget id="calculator">18 - 5</gadget>
<output>13</output>

<gadget id="calculator">12 + 24 + 13</gadget>
<output>49</output>

<gadget id="calculator">49 * 0.2</gadget>
<output>9.8</output>

<result>9.8</result>