The greatest common divisor of two numbers is 4, and the least common multiple is 1428. If one number is 84, what is the other number?
两个数的最大公约数是4，最小公倍数是1428，已知一个数为84，则另一个数是多少．
<gadget id="calculator">1_428 / 84</gadget>
<output>17</output>

<gadget id="calculator">17 * 4</gadget>
<output>68</output>

<result>68</result>