classroom is 8 meters long, 6 meters wide, and 4 meters high. The walls and ceiling are to be painted, excluding doors, windows, and blackboards, a total of 25 square meters. How many square meters is the area to be painted?
一个教室，长8米，宽6米，高4米，粉刷墙壁和顶棚，除出门窗、黑板共25平方米，要粉刷的面积是多少平方米？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

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

<gadget id="calculator">32 + 24</gadget>
<output>56</output>

<gadget id="calculator">56 * 2</gadget>
<output>112</output>

<gadget id="calculator">112 - 25</gadget>
<output>87</output>

<gadget id="calculator">48 + 87</gadget>
<output>135</output>

<result>135</result>