The greatest common factor of two numbers is 7, the least common multiple is 252, one of them is 28, what is the other number?
两个数的最大公因数是7，最小公倍数是252，其中一个数是28，另一个数是多少？
<gadget id="calculator">252 / 28</gadget>
<output>9</output>

<gadget id="calculator">7 * 9</gadget>
<output>63</output>

<result>63</result>