It takes 10 days for Sumin to do something alone, and 15 days for Junwoo to do it alone. Answer how many days it will take to complete the task if two people are doing it together.
1 1 10 [OP_DIV] 1 15 [OP_DIV] [OP_ADD] [OP_DIV]
var_a = 1
var_b = 1
var_c = 10
var_d = var_b / var_c
var_e = 1
var_f = 15
var_g = var_e / var_f
var_h = var_d + var_g
var_i = var_a / var_h
print(int(eval('{:.2f}'.format(round(var_i+1e-10,2)))))