Answer
The least common multiple of the two numbers is $540$.
Work Step by Step
Factor each number to obtain:
$60=10(6)=5(2)(3)(2)=5(3)(2)(2)
\\108=9(12)=3(3)(3)(2)(2)=3(3)(3)(2)(2)$
Thus, the least common multiple of the two numbers is $5(3)(3)(3)(2)(2)=540$.