just enter the number you want to round about to the nearest 10. it's a loop so after the nearest 10 has been calculated, the computer will wait for 5 secs till you read the answer
(background music youtube.com link- rotten to the core: https://www.youtube.com/watch?v=zGlLe1w3DJM if only- https://www.youtube.com/watch?v=JFYedt-KnB0 chillin' like a villain- https://www.youtube.com/watch?v=tSDcbucrWmw you and me- https://www.youtube.com/watch?v=Q0kuJ3lPnPY