eyy guys - meaning of greater than three, heart

eyy guys, m back.
i wnted to knw meanings of less than 3

ppl on whatsupp be commentng like 'hi how are you less than 3'
then they say gudbye and say again less than thre

i wanting to know this means? ez this sum kind of algorithm or calculus? me dnt know you halps.

#IfuM
i luv u gais :heart:
i wish there was symbol 4 heart it will maek my lyf easy.

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