Difficult calculation..

Biah - sometimes I really do t know what to think ... I went to the baker this morning to get some bread and cookies for m mom in law... so when it was my turn to pay the lady had an amount in her calculator which didn’t belong to me - 70 cent... the amount was 8.63 Euros and she had to subtract those 70 cents... she tried .. (I saw the brain working ) - I waited - ( had my money already in the hand but wanted to hear it from her)
she looked at the ceiling - I waited... she looked at the ceiling and waited for the result to come down from there - I waited - she took her calculator and after a while she smiled at me and yelled 7,93 Euro - finally!!!! Gave her 8 Euro and I got 7 cents back - right!!!! What a math journey ....