The greatest common divisor and least common multiple of two numbers are 3 and 135 respectively. Find the smallest difference between these two numbers.
两个数的最大公约数和最小公倍数分别是3和135，求这两个数的差最小是多少．
<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">27 - 15</gadget>
<output>12</output>

<result>12</result>