The perimeter of a square is equal to the perimeter of a rectangle with a length of 20 cm and a width of 12 cm. What is the side length of the square in cm?
一个正方形的周长与一个长20厘米，宽12厘米的长方形周长相等，这个正方形的边长是多少厘米？
<gadget id="calculator">20 + 12</gadget>
<output>32</output>

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

<gadget id="calculator">32 * (1/2)</gadget>
<output>16</output>

<result>16</result>