The greatest common factor of two numbers is 14, the least common multiple is 168, one of the numbers is 42, what is the other number.
两个数的最大公因数是14，最小公倍数是168，其中一个数是42，另一个数是多少．
<gadget id="calculator">168 / 42</gadget>
<output>4</output>

<gadget id="calculator">4 * 14</gadget>
<output>56</output>

<result>56</result>