4 languages, 24 bytes, 24/4^3=0.375
print(1//0.5--1+1/2*2 ); 1. PHP
##4 languages, 24 bytes, 24/4^3=0.375 print(1//0.5--1+1/2*2 ); ##1. PHP PHP executes print(1); which equals 1 ##2.
2. Lua
Lua Lua executes print(1//0.5); which equals 2 ##3.
3. Python 2
Python 2 Python 2 executes print(1//0.5--1+1/2*2); which equals 3 (integer division) ##4.
4. Python 3
Python 3 Python 3 executes print(1//0.5--1+1/2*2); which equals 4 (float division)