Answer
$3$
Work Step by Step
Cancelling the common factors between the numerator and the denominator, the given expression, $
\dfrac{3\cdot2\cdot1}{2\cdot1}
,$ simplifies to
\begin{array}{l}\require{cancel}
\dfrac{3\cdot\cancel{2\cdot1}}{\cancel{2\cdot1}}
\\\\=
3
.\end{array}