The least common multiple of 3, 6, 8 is x, the greatest common factor of 12, 54 is y, then xy=how many.
3、6、8的最小公倍数是x、12、54的最大公因数是y，则x-y=多少．
<gadget id="calculator">24 - 6</gadget>
<output>18</output>

<result>18</result>