A deck of playing cards (54 cards), from which one is randomly drawn, what is the probability of drawing a square.
一副扑克牌(54张)，从中任意抽取一张，抽到方块的可能性是多少．
<gadget id="calculator">13 / 54</gadget>
<output>13/54 = around 0.240741</output>

<result>13/54 = around 0.240741</result>