Evaluate 3!!

$3!!$

Expand $3!$ to $3 \cdot 2 \cdot 1$ .

$3 \cdot 2 \cdot 1!$

Simplify.

Multiply $3$ by $2$ .

$6 \cdot 1!$

Multiply $6$ by $1$ .

$6!$

Expand $6!$ to $6 \cdot 5 \cdot 4 \cdot 3 \cdot 2 \cdot 1$ .

$6 \cdot 5 \cdot 4 \cdot 3 \cdot 2 \cdot 1$

Simplify.

Multiply $6$ by $5$ .

$30 \cdot 4 \cdot 3 \cdot 2 \cdot 1$

Multiply $30$ by $4$ .

$120 \cdot 3 \cdot 2 \cdot 1$

Multiply $120$ by $3$ .

$360 \cdot 2 \cdot 1$

Multiply $360$ by $2$ .

$720 \cdot 1$

Multiply $720$ by $1$ .

$720$