Vertical Calculator reimagines math as kinetic wall art. A slim 40 cm aluminum column hosts ten silent magnetic sliders, each gliding along a precision track to display digits 0–9. Tap the plus, minus, or equals zones to instantly compute, while an E-ink strip at the top shows the running total in crisp black-and-white. Built-in gyroscope flips orientation for portrait or landscape use; USB-C charges a 30-day battery. Mount it in kitchens, classrooms, or offices—the anodized frame and matte beads resist fingerprints and glare. From grocery tallies to homework checks, this vertical marvel turns every calculation into a satisfying slide-and-see experience.