Axolotl and Fish care, Tank sizes?

So i have a fish tank thats 60.2 cm wide by a depth of 38 cm, i dont know how many liters it is? but i was wondering if i could keep 3 axolotls in there? i already have one whos pretty small, so are the other ones i was planning on getting? if not mabey 2? please only answer if you fully know what your talking about :) thanks