The least common multiple of two numbers A and B is 168, the greatest common divisor is 4, A's number is 24, what is B's number.
甲乙两数的最小公倍数是168，最大公约数是4，甲数是24，乙数是多少．
<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>