Help lower the liquidation price

#DOGE guys I have a question, what happens if I add margin to an ongoing futures operation? For example, I put 120 into a long position in DOGE at x3, because I plan to leave it there for a while, and I started at .37875. If I add more margin to the 120 dollars and let's say it's already at .4, hypothetically, and it's a 7%, would I automatically get 7% of 220 dollars if I put in another 100 dollars? I don't think so, right? I don't think it works that way, or does it? Or is what you do to balance between the .37 and the price when I entered the extra 100 dollars? Could someone please help me with this, I'm new and I would like to know how it would work if I add more margin.