The perimeter of a rectangle is 120 centimeters. If the length is increased by 12 centimeters, the length of the rectangle is now three times the width. If the original rectangle is to be cut into a largest square, what is the perimeter of the square in centimeters?
一个长方形的周长是120厘米，如果长增加12厘米，那么现在长方形的长就是宽的3倍，如果要把原长方形剪成一个最大的正方形，那么这个正方形的周长是多少厘米．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">120 + 24</gadget>
<output>144</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">144 / 8</gadget>
<output>18</output>

<gadget id="calculator">18 * 4</gadget>
<output>72</output>

<result>72</result>