Uchten is a
german slang word for calculator. It’s mainly used by younger
people (in school) to avoid using the very long word "Taschenrechner", which is the original word for calculator in
german.
"Denkst du wir brauchen heute den Uchten in der Klassenarbeit?" -> "Do you think we will need a calculator in
today's exam?"
"Kann ich mit deinem Uchten etwas ausuchten?" -> "Can I use your calculator to calculate
something?"
"
Das ist mein neuer Uchten" -> "That's my new calculator"