Introduction - If you have any usage issues, please Google them yourself
3, the keyboard takes a number, that number represents the printing time, the largest unit of the day, such as:
Keyboard input 6, print 6 seconds
Keyboard input 60, print a minute
Keyboard input 66, print 1 minute 6 seconds
666 keyboard input, print 11 minutes 6 seconds
3601 keyboard input, print one hour one second