To paint a classroom with a length of 12 meters, a width of 7 meters and a height of 4 meters, the area excluding doors, windows and blackboards is 26 square meters. What is the minimum area to be painted?
粉刷一间长12米，宽7米，高4米的教室，除去门窗和黑板的面积26平方米，至少要粉刷多大面积？
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<gadget id="calculator">48 + 28</gadget>
<output>76</output>

<gadget id="calculator">2 * 76</gadget>
<output>152</output>

<gadget id="calculator">12 * 7</gadget>
<output>84</output>

<gadget id="calculator">84 - 26</gadget>
<output>58</output>

<gadget id="calculator">152 + 58</gadget>
<output>210</output>

<result>210</result>