A bag containing 14 identical books weighs 11.14 kilograms (kg). If the empty bag weighs 0.5 kilograms (kg), how much does one book weigh in kilograms (kg)?
11.14 0.5 [OP_SUB] 14 [OP_DIV]
var_a = 11.14
var_b = 0.5
var_c = var_a - var_b
var_d = 14
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))