A classroom is 8.4m long, 6m wide, and 4m high. It is necessary to paint the walls and ceiling of the classroom. Excluding the door and window area of 25m**2, how many square meters is the area to be painted?
一间教室长8.4m，宽6m，高4m，要粉刷教室的墙壁和顶棚，除去门窗面积25m**2，要粉刷的面积是多少平方米？
<gadget id="calculator">8.4 * 6</gadget>
<output>50.4</output>

<gadget id="calculator">8.4 * 4</gadget>
<output>33.6</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">33.6 + 24</gadget>
<output>57.6</output>

<gadget id="calculator">57.6 * 2</gadget>
<output>115.2</output>

<gadget id="calculator">115.2 - 25</gadget>
<output>90.2</output>

<gadget id="calculator">50.4 + 90.2</gadget>
<output>140.6</output>

<result>140.6</result>