A 26 cm long rectangular iron sheet, cut off a square with a side length of 4 cm at each of the four corners, and then make an iron box without a lid. The volume of this iron box is 792 cubic centimeters. What is the area of the sheet of iron in square centimeters?
一块26厘米长的长方形铁皮，四个角各剪去一个边长4厘米的正方形，然后做成一个无盖铁盒，这个铁盒的容积是792立方厘米．原来这块铁皮的面积是多少平方厘米．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">26 - 8</gadget>
<output>18</output>

<gadget id="calculator">792 / 18 / 4</gadget>
<output>11</output>

<gadget id="calculator">11 + 8</gadget>
<output>19</output>

<gadget id="calculator">26 * 19</gadget>
<output>494</output>

<result>494</result>