When a square tile is attached to a wall measuring 120 centimeters (cm) wide and 96 centimeters (cm) long, how many centimeters (cm) should one side of the tile be in length to attach the largest tile to the wall without any extra space?
120 96 [OP_GCD]
var_a = 120
var_b = 96
var_c = math.gcd(int(var_b), int(var_a))
print(int(var_c))