Convert year, month, day, hour, minute, and second to each other, enter a value, and calculate data for other units. The calculation rule is: 1 year is equivalent to 12 months, 1 month is equivalent to 30 days, 1 day is equivalent to 24 hours, 1 hour is equivalent to 60 minutes, 1 minute is equivalent to 60 seconds, and 1 second is equivalent to 1000 milliseconds