If the perimeter of a square is 10 cm, what is the length of its side in cm?
一个正方形的周长是10厘米，它的边长是多少厘米．
<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>