Taking You Into The Double Digits

(My sister and I are watching a TV show where children perform difficult mental tasks. In this round, they have to perform a series of calculations within a certain time limit. This contestant gives one answer just before the clock runs out, and the emcee is starting to give the next question:)

Em-Cee: “Nine thousand …” *timer runs out* “Time’s up!”

Sister: “Nine thousand times up? I wasn’t aware ‘up’ was a digit.”

Me: *gives her a thumbs-up* “Here’s a digit that’s ‘up.'”

Sister: *holds up middle finger* “Here’s another.”