I made a roundtrip between two points A and B by bicycle, traveling at 15 kilometers (km) per hour on the way and 10 kilometers (km) per hour on the way back. It took 30 minutes longer on the way back. Find the distance between two points A and B.
30 60 [OP_DIV] 1 10 [OP_DIV] 1 15 [OP_DIV] [OP_SUB] [OP_DIV]
var_a = 30
var_b = 60
var_c = var_a / var_b
var_d = 1
var_e = 10
var_f = var_d / var_e
var_g = 1
var_h = 15
var_i = var_g / var_h
var_j = var_f - var_i
var_k = var_c / var_j
print(int(eval('{:.2f}'.format(round(var_k+1e-10,2)))))