Hello wiseowl,

I believe the answer is 25 gallons.

First I began by converting the 15 meters and 60 meters to feet and got

15 meters = 49.2126 feet and 60 meters = 196.85 feet.

Next I needed to find the area of the wall so I multiplied the numbers above and got 9687.50031 feet squared.

I rounded this up to 9688 feet squared.

Finally, I divided 9688 sqft by 400 sqft and got 24.22.

Since the problem is asking for the **smallest** amount of **whole** gallons, we round up 24.22 and get **25 gallons** of paint.

Please let me know if I did anything wrong, it has been a while since I have done this math and may have done something wrong.

- Keihaku ;)