The sum of the weight of 9 comic books and 7 children's books was 10.98 kilograms (kg). If a comic book weighs 0.8 kilograms (kg), how many kilograms (kg) does a children's book weigh?
10.98 0.8 9 [OP_MUL] [OP_SUB] 7 [OP_DIV]
var_a = 10.98
var_b = 0.8
var_c = 9
var_d = var_b * var_c
var_e = var_a - var_d
var_f = 7
var_g = var_e / var_f
print('{:.2f}'.format(round(var_g+1e-10,2)))