A can of paint can be painted 25 square meters and kept at 5 square meters (accurate)

The wall area is about 320 square meters, and it is reserved to 10 square meter (nearest).

How much paint do I need to buy at most?

A can of paint can be brushed at least: 24.5 square meters.

The maximum wall area is 324 square meters.

At most, you need to buy: 324÷24.5≈ 14 listening (into one)