How to round a number up or down to the nearest 5th

I can't figure this out. I'm trying to round any number to the nearest 5th. I want to do it like I can in Google sheets. The link will take you to what I'm trying to do in app inventor.

https://support.google.com/docs/answer/3093471

This example specifically

Result / Formula
130 / =CEILING(126.85, 10

That example is the nearest 10th but you get the point I hope.
Thanks!

Snipaste_2020-06-30_10-27-46

Close, but no cigar:

nearest5th_test2 nearest5th_test2 nearest5th
(draggable blocks)

(Wrong 5th, apparently.- ABG)

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