The ratio of two numbers of A and B is 5:6, A's number is 20, what is B's number.
甲乙两数的比是5：6，甲数是20，乙数是多少．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">20 * (6/5)</gadget>
<output>24</output>

<result>24</result>