The fishmonger sold half of the fish he had for lunch and 1/3 of the rest for dinner, leaving 12 fish. How many fish did they originally have in the shop?
12 1 1/3 [OP_SUB] [OP_DIV] 1 1/2 [OP_SUB] [OP_DIV]
var_a = 12
var_b = 1
var_c = 0.3333333333333333
var_d = var_b - var_c
var_e = var_a / var_d
var_f = 1
var_g = 0.5
var_h = var_f - var_g
var_i = var_e / var_h
print(int(eval('{:.2f}'.format(round(var_i+1e-10,2)))))