The number A is the number B (5/7), the number C is the number B (4/3), and the number A is the number C ((())/(())).
甲数是乙数的(5/7)，丙数是乙数的(4/3)，甲数是丙数的((())/(()))．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(5/7) / (4/3)</gadget>
<output>15/28 = around 0.535714</output>

<result>15/28 = around 0.535714</result>