The average of three numbers is 6, the ratio of these three numbers is (1/2):(2/3):(5/6), what is the largest of these three numbers.
三个数的平均数是6，这三个数的比是(1/2)：(2/3)：(5/6)，这三个数中最大的是多少．
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">18 * (5/12)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>