breakfast: grape nuts cereal w/ water & an apple.

lunch: small turkey wraps, with lettuce & mayo.. and like 2 carrot sticks.

dinner: 2 bowls of honey nut cheerios w/ water & a pear.

will i gain weight from this? is this all good for someone trying to lose or stay the same weight?
i also exercised today; i walked around for like 3 hours before i ate dinner & played tennis.