Meanings
idiomaticcalculating correctly, by the rules of mathematics
Wenn du am Tag 70 Euro verdienst, aber über 20 Euro Fahrtkosten hast, bleiben dir nach Adam Riese nicht mal 50 Euro übrig.If you earn 70 euro a day, but you've commuting expenses over 20 euro, then according to my arithmetic you're left with less than 50 euro.
colloquial · humorousaccording to Cocker; according to Gunter
Das macht nach Adam Riese zwanzig Euro.