Selling house/ math question

This might be very stupid to ask so I apologize but I cannot figure this out. My grandma is selling her house for $570,000. She's splitting it in ways. Herself, me, and my cousin

We wanted to get $600,000 for the house but we can't. If we did get that we would have done $200.000 each.

My question is how can we split $570,000 evenly or somewhat evenly. If we can't do it completely even my grandma would get the most, than my cousin and I would get an even amount.