A cuboid whose base is a square with a perimeter of 20 centimeters, if a 4 centimeter length is cut off, it becomes a cube. What is the surface area of the original cuboid?
一个长方体，底面是一个周长是20厘米的正方形，如果锯掉4厘米长的一截，就变成了一个正方体．原来长方体的表面积是多少平方厘米？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">25 + 45 + 45</gadget>
<output>115</output>

<gadget id="calculator">115 * 2</gadget>
<output>230</output>

<result>230</result>