all_calculations = ['100 lb is 45.4 kg', '200 lb is 90.7 kg',
                    '600 lb is 272.2 kg', '300 lb is 136.1 kg',
                    '400 lb is 181.4 kg', '500 lb is 226.8 kg']

newest_first = list(reversed(all_calculations))

print("==== Oldest to Newest for File ====")
for item in all_calculations:
    print(item)

print()

print("==== Most Recent First ====")
for item in newest_first:
    print(item)