Damage = ((((2 * Level / 5 + 2) * AttackStat * AttackPower / DefenseStat) / 50) + 2) * STAB * Weakness/Resistance * RandomNumber(85-100) / 100

If we substitute the numbers in, we get

**((((2 x Level / 5 + 2) x AttackStat(including EV, IV and nature) x 40 / DefenseStat) / 50) + 2) x STAB x Weakness/Resistance x RandomNumber(85-100) / 100**

I cant get the exact damage since it is also depended by your level, opponent's defense, and your exact attack stat, weakness

If you are lv100, with 100 atk stat, neutral, and you opponent has 50def,

((((42) x 100 x 40 / 50) / 50) + 2) x 1.5 x RandomNumber(85-100) / 100

103.8 x RandomNumber(85-100) / 100

=88-103 damage

http://www.serebii.net/games/damage.shtml