To tell time
Count your change.
Measure for cooking.
Phone numbers.
Address.
And a bazillion more. (That's not a real number, it's imaginary.)
what is the use of real numbers in daily life?
Pretty much anything that uses a number. Just buy a drink at a convenience store has a multitude of uses of real numbers. There is the price. The UPC code that gets scanned. The taxes added. The sales total. The money you count out, or the number on your credit/debit card, you use to pay. If you used a card then there is the account number the card is attached to. Then balancing your account.
Do you get the idea now?
While counting money, Phone number.