You can use it to build buildings, pools, and and if your boss gives you a mathematical equation, you can answer it.
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You will use the numbers pi and e (or applications which use them).
If you mean pie: it is eaten. If you mean the number pi: It is used in all sorts of situations. Whether you use it in "real life situation" mainly depends whether you work in engineering. Most people won't use the number pi in their daily lives.
we do not regularly use pi in our everyday life. But suppose you some how end up one day painting a cylindrical room. You will have to use pi to find out the circumference or surface area of the room you will have to use pi to figure out how much area you will have to paint
daily life use in geomatry
No, I don't own one so I can't use one in my daily life.