The box, which had 12 identical children's books inside, weighed 11.48 kilograms (kg). When 4 children's books were removed from the box, it weighed 8.12 kilograms (kg). What is the weight of the empty box in kilograms (kg)?
11.48 11.48 8.12 [OP_SUB] 4 [OP_DIV] 12 [OP_MUL] [OP_SUB]
var_a = 11.48
var_b = 11.48
var_c = 8.12
var_d = var_b - var_c
var_e = 4
var_f = var_d / var_e
var_g = 12
var_h = var_f * var_g
var_i = var_a - var_h
print('{:.2f}'.format(round(var_i+1e-10,2)))