Where can I change my $50 notes into $10 notes?

Any idea which places I can go if I wanna change my $50 notes into $10 notes?

I have about a dozen $50 notes, and I'd like to change all these large notes into smaller notes such as $10.

bank

money changer

buy a $2 item (at daiso) and use the $50 note

Use cash deposit machine to desposit to your Bank and withdrawal 40 by 40 from ATM ^^