The ratio of the three numbers A, B, and C is 2:3:5, and the average number is 120. What is the number C?
甲、乙、丙三个数的比是2：3：5，平均数是120，则丙数是多少？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">2 + 3 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">360 * (1/2)</gadget>
<output>180</output>

<result>180</result>