The greatest common factor of two numbers A and B is 3, and the least common multiple is 25. If the number A is 15, what is the number B?
甲、乙两数的最大公因数是3，最小公倍数是25．如果甲数是15，那么乙数是多少．
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 * (1/5)</gadget>
<output>5</output>

<result>5</result>