The ratio of number A to number B is 5:6, number B is 60, what is number A?
甲数与乙数的比是5：6，乙数是60，甲数是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">60 * (5/6)</gadget>
<output>50</output>

<result>50</result>