def convert_lbs_to_kg(weight_lbs):
    weight_kg = weight_lbs / 2.20462
    return weight_kg

convert_lbs_to_kg(22)

def convert_lbs_to_kg(weight_lbs):
    weight_kg = weight_lbs / 2.20462
    return weight_kg
result = convert_lbs_to_kg(170)
print weight_kg