A wire can just surround a rectangle with a length of 22 cm and a width of 14 cm. If a square is surrounded by this wire, what is the side length of the square?
根铁丝刚好可以围一个长22cm，宽14cm的长方形．如果用这根铁丝围成一个正方形，正方形的边长是多少厘米？
<gadget id="calculator">22 + 14</gadget>
<output>36</output>

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

<gadget id="calculator">36 * (1/2)</gadget>
<output>18</output>

<result>18</result>