The living room of Li Hong's house is 5m long, 3.4m wide, and 3m high, with a door and window area of 12m**2. Paint the walls and top of the living room, and use 0.25 kilograms of paint per square meter. How many kilograms of paint are needed in total?
李红家的客厅长5m、宽3.4m、高3m，门窗面积12m**2．在客厅四面的墙壁和顶部粉刷涂料，每平方米用涂料0.25千克，一共需要涂料多少千克？
<gadget id="calculator">5 * 3.4</gadget>
<output>17</output>

<gadget id="calculator">5 * 3 * 2</gadget>
<output>30</output>

<gadget id="calculator">3.4 * 3 * 2</gadget>
<output>20.4</output>

<gadget id="calculator">17 + 30 + 20.4</gadget>
<output>67.4</output>

<gadget id="calculator">67.4 - 12</gadget>
<output>55.4</output>

<gadget id="calculator">55.4 * 0.25</gadget>
<output>13.85</output>

<result>13.85</result>