Next time you calculate a tip, thank Blaise Pascal, namesake of a fundamental law of pressure and inventor of one of the first digital calculators, born #OTD in 1623. 💹💱➗ . . . . . . . #science #math #inventor #invent #calculate #calculator #onthisday #happybirthday #hbd #scientist #mathematicitian #mathematics #throwback #oldstuff #history #ease #makinglifeeasier #thanks