If the perimeter of a square is 24 decimeters, what is the length of its side in centimeters?
一个正方形的周长24分米，它的边长多少厘米．
<gadget id="calculator">24 * 10</gadget>
<output>240</output>

<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<result>60</result>