The average of the three numbers is 36. The ratio of the three numbers is 3:4:5. What is the largest of the three numbers?
三个数的平均数是36，这三个数的比是3：4：5，三个数中最大的是多少．
<gadget id="calculator">36 * 3</gadget>
<output>108</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">108 * (5/12)</gadget>
<output>45</output>

<result>45</result>