Math dudes off by 2 billion... maybe?
Math dudes should abandon hubris and learn chagrin

cha·grin
/SHəˈɡrin/
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noun
distress or embarrassment at having failed or been humiliated.
"Jeff, much to his chagrin, wasn't invited"
synonyms: annoyance, irritation, vexation, exasperation, displeasure, pique, spleen, crossness, anger, rage, fury, wrath; More


Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven.