It is known that A/B=3 and C/B=4, so how much less is A than C?
已知甲/乙=3，丙/乙=4，那么甲比丙少多少
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>