Ok, floor and ceil resultats in de natural number, up or down.
Round I still remember from school 
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Ok, I urgently have to buy better glasses 
(for real)
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After seeing things like Pi, sin, cos etc my subconscience forced me to quickly close the screen (to prevent reliving repressed trauma from school)
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In my career I used a lot of Geometry. Once we started Programming machines we had to do Trigonometry again . Just to make things easier to remember we used to Chase it around with TAN . I struggled with Maths at School but said that I was interested in Programming 16 years before the first Home PC. They Laughed at me . I have to say that my coding is very Basic but I can get stuff done if I put my mind to it now .
we have been given a Special gift to help us . Copy and Paste.