You understand math jokes, but in your calculations π is 3, which is fine, because you get paid pretty good anyway. Good enough to buy this hat. Dad hats aren't just for dads. This one's got a low profile with an adjustable strap and curved visor.
Hit the add to cart button, it is OK. • 100% chino cotton twill • Unstructured, 6-panel, low-profile • 3 ⅛” crown • Adjustable strap with antique buckle • Head circumference: 20 ½” - 21 ⅝”