A wire just surrounds a rectangle with a length of 32 cm and a width of 18 cm. If the wire is used to form a square, what is the side length of the square?
一根铁丝正好围成一个长32厘米，宽18厘米的长方形．如果用这根铁丝围成一个正方形，那么这个正方形的边长是多少厘米？
<gadget id="calculator">32 + 18</gadget>
<output>50</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<result>25</result>