Kyungho likes to ride a bike. The guard rode a bicycle at 3 kilometers (km) per hour from home and went for a walk, and returned home from city hall at 4 kilometers (km) per hour. When he returned, he chose a road that was 2 kilometers (km) longer than when he went, and when he returned home, 4 hours had passed since before he left. Find the time taken to return.
4 2 4 [OP_DIV] [OP_SUB] 1 3 [OP_DIV] 1 4 [OP_DIV] [OP_ADD] [OP_DIV] 2 [OP_ADD] 4 [OP_DIV]
var_a = 4
var_b = 2
var_c = 4
var_d = var_b / var_c
var_e = var_a - var_d
var_f = 1
var_g = 3
var_h = var_f / var_g
var_i = 1
var_j = 4
var_k = var_i / var_j
var_l = var_h + var_k
var_m = var_e / var_l
var_n = 2
var_o = var_m + var_n
var_p = 4
var_q = var_o / var_p
print(int(var_q))