The ratio of the numbers A and B is 5:8, the number of A is 6 less than the number of B, what is the number of B?
甲、乙两数的比是5：8，甲数比乙数少6，乙数是多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<result>16</result>