If a rectangular wire frame with a length of 24 cm and a width of 16 cm is changed into the largest square, what is the side length of the square in cm?
把一个长24厘米、宽16厘米的长方形铁丝框改围成一个最大的正方形，正方形的边长是多少厘米？
<gadget id="calculator">24 + 16</gadget>
<output>40</output>

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

<gadget id="calculator">40 * (1/2)</gadget>
<output>20</output>

<result>20</result>