The ratio of A and B is 2:9, A's number is 6, what is B's number?
甲、乙两数的比是2：9，甲数是6，乙数是多少．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">6 * (9/2)</gadget>
<output>27</output>

<result>27</result>