room is 6m long, 3.5m wide, and 3m high. Now we need to paint white paint on the roof and four sides of the house. It is known that one square meter of paint costs 5 yuan. How much does it cost after deducting the area of doors and windows of 5.1 square meters?
一个房间长6m、宽3.5m、高3m．现在要在房子的屋顶和四面涂上白色涂料，已知一平方米的涂料需要5元钱，扣除门窗面积5.1平方米后需要多少钱？
<gadget id="calculator">6 * 3.5</gadget>
<output>21</output>

<gadget id="calculator">6 * 3 * 2</gadget>
<output>36</output>

<gadget id="calculator">3.5 * 3 * 2</gadget>
<output>21</output>

<gadget id="calculator">21 - 5.1</gadget>
<output>15.9</output>

<gadget id="calculator">21 + 36 + 15.9</gadget>
<output>72.9</output>

<gadget id="calculator">72.9 * 5</gadget>
<output>364.5</output>

<result>364.5</result>