We know that bitcoin is strong and all the wallets have milletry grade security but one of my stupid friend today said that maybe someone can hack it with just a calculater because with math and correct formulas we can even predict gambling bets if that is possible then maybe there is any chance of this
Wallets currently cannot be hacked by just calculating on a normal computer. These is a threat in the future with quantum computers that are in development (not near completion yet btw) that could in fact hack into your wallet. However you must know that if you keep your coins in the cold wallet you are absolutely safe. Unless someone beats you on the street and steals it from you and makes u tell the passwords.
Btw i find your question in the topic not very related to the question in the post itself... and if you call your friend stupid, why do you even think about the things he says?
BR.
do not be easy to believe with friends,because friends can just cornering/influencing us so that we easily lied to but believe in yourself it is better. Think carefully before maturity act and keep your wallet security well and thoroughly so we are not easily hacked.