Hello @varun,
If you enter 2 lots for a sell position and 1 lot for a buy position, and use a quantity multiplier of 1, the system will execute 2 lots for the sell position and 1 lot for the buy position. The quantity multiplier simply multiplies the quantity you entered in the strategy. You can add different quantities for the sell and buy positions in a single strategy.
Let me know if you have any further questions or concerns.