"Square root in keyboard," she muttered, frustrated. No dedicated key. No obvious symbol.
Then she remembered: on Mac, it was Option+v. She pressed it. √ appeared. square root in keyboard
Later that night, her younger brother saw her typing √ and asked, "What's that?" "Square root in keyboard," she muttered, frustrated
He nodded seriously, then whispered, "What if keyboards had a √ key?" "Square root in keyboard
"In keyboard?" he echoed, tilting his head.
She laughed. "No — on screen. But you can find it if you know where to look."