The average of the numbers A, B, and C is 56, and their ratio is 1:2:5. How much is B?
甲、乙、丙三数的平均数是56，它们的比是1：2：5，乙是多少？
<gadget id="calculator">56 * 3</gadget>
<output>168</output>

<gadget id="calculator">1 + 2 + 5</gadget>
<output>8</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">168 * (1/4)</gadget>
<output>42</output>

<result>42</result>