genuinely so confused about these gummies lol

hey so im scottish, and ive just got these edibles today they are an american import, theres five in the pack but it says “1x airhead bar infused with 500mg thc” that just doesnt sound right to me? is that correct? genuinely curious im usually a smoker but ive had edibles before n never seen any with a higher mg than 200mg per piece before, sorry if this is making me come off as super slow or something im just curious on wether its maybe a typo or not bc ive ate two pieces thinking they were 100mg each and now im panicking cos with joints atleast i can see how much im putting in with these i have no idea how much 500mg equates to LMFAO