A pink rabbit and a white rabbit is running a race. The pink rabbit ran at a speed of 15 kilometers per hour (km), and the white rabbit ran at a speed of 10 kilometers per hour (km), arriving 30 minutes later than the pink rabbit. Find the time it took for the pink rabbit to arrive.
10 30 60 [OP_DIV] [OP_MUL] 15 10 [OP_SUB] [OP_DIV]
var_a = 10
var_b = 30
var_c = 60
var_d = var_b / var_c
var_e = var_a * var_d
var_f = 15
var_g = 10
var_h = var_f - var_g
var_i = var_e / var_h
print(int(var_i))