Simple determinant calculator in python

calculator.py

def clac(l):
	return (
	l[0][0] * l[1][1] * l[2][2] +
	l[0][1] * l[1][2] * l[2][0] +
	l[0][2] * l[1][0] * l[2][1]) - (
	l[2][0] * l[1][1] * l[0][2] +
	l[1][0] * l[0][1] * l[2][2] +
	l[0][0] * l[2][1] * l[1][2] )

print(clac(
[
   [12,9,7],
   [12,10,8],
   [12,28,34]
]
))