A car that is 30 meters (m) away from the house travels at 1 meter (m) per hour, and a car 20 meters (m) from the house travels at 0.5 meters (m) per hour. Find the distance to the house from the cars when the two cars meet.
30 30 20 [OP_SUB] 1 0.5 [OP_SUB] [OP_DIV] [OP_SUB]
var_a = 30
var_b = 30
var_c = 20
var_d = var_b - var_c
var_e = 1
var_f = 0.5
var_g = var_e - var_f
var_h = var_d / var_g
var_i = var_a - var_h
print(int(var_i))