For a room with a length of 6 meters, a width of 4 meters and a height of 2.8 meters, the lower part of its four walls is painted with 1.2 meters of paint (except for the 1 square meter of the door opening). If 1 square meter of paint is 15 yuan, How much will it cost in total?
一间长6米、宽4米、高2.8米的房间，它的四面墙的下部刷了1.2米高的油漆(除去开门处1平方米不刷)，如果1平方米的油漆15元钱，一共要用多少钱？
<gadget id="calculator">6 * 1.2 * 2</gadget>
<output>14.4</output>

<gadget id="calculator">4 * 1.2 * 2</gadget>
<output>9.6</output>

<gadget id="calculator">9.6 - 1</gadget>
<output>8.6</output>

<gadget id="calculator">14.4 + 8.6</gadget>
<output>23</output>

<gadget id="calculator">23 * 15</gadget>
<output>345</output>

<result>345</result>