Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: Place each of the digits 6, 7, 8 and 9 in exactly one square to make the smallest possible product. What is this product? [asy]draw((0,.5)--(10,.5),linewidth(1));
draw((4,1)--(6,1)--(6,3)--(4,3)--(4,1),linewidth(1));
draw((7,1)--(9,1)--(9,3)--(7,3)--(7,1),linewidth(1));
draw((7,4)--(9,4)--(9,6)--(7,6)--(7,4),linewidth(1));
draw((4,4)--(6,4)--(6,6)--(4,6)--(4,4),linewidth(1));
draw((1,3)--(2,4),linewidth(1));
draw((1,4)--(2,3),linewidth(1)); [/asy]
user