The sum of the numbers A and B is 16, and the ratio of these two numbers is 5:3, what is the number B?
甲、乙两数的和是16，这两个数的比是5：3，则乙数是多少．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">16 * (3/8)</gadget>
<output>6</output>

<result>6</result>