The average of the two numbers A and B is 48, and the ratio of A and B is 3:5, so what is the number B?
甲、乙两数的平均数为48，甲、乙两数的比为3：5，那么乙数是多少．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

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

<gadget id="calculator">48 * (1/4)</gadget>
<output>12</output>

<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<result>60</result>