The ratio of the number A to the number B is (5/6). If the number B is 30, what is the number A?
甲数比乙数的比值是(5/6)，如果乙数是30，甲数是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) * 30</gadget>
<output>25</output>

<result>25</result>