Machine A alone takes 10 hours to complete the job, and machine B takes 15 hours to complete the job alone. How many hours would it take for A and B to do this at the same time?
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)))))