If the weight of the heavy box is 14/15 kg (kg), and the light box is 1/10 kg (kg) lighter than the heavy box, find the sum of the weights of the two boxes in kg (kg).
14/15 2 [OP_MUL] 1/10 [OP_SUB]
var_a = 0.9333333333333333
var_b = 2
var_c = var_a * var_b
var_d = 0.1
var_e = var_c - var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))