The average of the three numbers A, B, and C is 80. The ratio of these three numbers is 1:2:3. What is the largest of these three numbers?
甲乙丙三个数的平均数是80，这三个数的比是1：2：3，这三个数中最大的一个数是多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">180 * (1/2)</gadget>
<output>90</output>

<result>90</result>