For two natural numbers a and b, the difference between their least common multiple and greatest common divisor is denoted as △, given that 6△x=27, find the value of x.
两个自然数a、b，他们的最小公倍数与最大公约数的差记为△，已知6△x=27，求x的值．
<gadget id="calculator">30 - 27</gadget>
<output>3</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<result>15</result>