Use an iron wire to form a rectangle with a length of 48 cm and a width of 24 cm. If this iron wire is re-enclosed into a square, what is the length of its side in cm?
用一根铁丝围成一个长方形，长是48厘米，宽是24厘米，如果把这根铁丝重新围成一个正方形，那么它的边长应是多少厘米．
<gadget id="calculator">48 + 24</gadget>
<output>72</output>

<gadget id="calculator">72 * 2</gadget>
<output>144</output>

<gadget id="calculator">144 / 4</gadget>
<output>36</output>

<result>36</result>