A's number a is more than B's (1/3), and B's money is represented by a formula containing letters.
甲数a元钱，比乙数多(1/3)，乙钱数用含有字母的式子表示是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>