A barrel full of fish of the same size and weight was weighed and found to be 54 kilograms (kg). After removing half of the fish from the barrel, it turned out to be 29 kilograms (kg). How many kilograms (kg) was the fish in the first place?
54 29 [OP_SUB] 2 [OP_MUL]
var_a = 54
var_b = 29
var_c = var_a - var_b
var_d = 2
var_e = var_c * var_d
print(int(var_e))