What is the comprehensive formula for playing the game "24" with "1, 3, 4, 6" four cards.
用"1、3、4、6"四张扑克牌玩"算24"游戏的综合算式是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / (1/4)</gadget>
<output>24</output>

<result>24</result>