When you walked around the school for the first time, you walked at 3 kilometers (km) per hour. For the second time, you walked 2 kilometers (km) more than the first time at the speed of 4 kilometers (km) per hour. If the walk took 4 hours in total, how much time would be taken for the first walk?
4 2 4 [OP_DIV] [OP_SUB] 1 3 [OP_DIV] 1 4 [OP_DIV] [OP_ADD] [OP_DIV] 3 [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 = 3
var_o = var_m / var_n
print(int(eval('{:.2f}'.format(round(var_o+1e-10,2)))))