Hi
Depends on the shape of the tank? If its a regular rectangle and its 60 litres, then shoud be fairly easy to divide
I think 60 ltrs is around 13 gallons so dividing into three would give each guy 4 and a bit gallons which would be really nice.
This is what I am planning on doing once my krib fry are sold and the fish who are an holiday in my 60 litre move back to the community tank! I wouldn't go for more than 3 myself in a rectangular tank because otherwise there isn't much in the way of swimming space except for up and down.