Swipeable Calculator Keypad

Design the active numeric keypad for a mobile calculator-style input flow. The main job is plain number entry, but each key can also reveal an alternate function through a swipe gesture.

The layout should feel familiar at first glance: big digit buttons, clear operator affordances, and a visible value field above. The gesture layer is the twist, not the core interaction.

Show how swipe directions map to alternate actions without making the keypad feel crowded. The user should understand what happens before they commit to the gesture.

This is an input surface, so speed matters. The design should support rapid taps, accidental swipe recovery, and a clean read of the current value while the keypad stays in place.

Use a tiny directional cue on only a few keys first; if every key advertises a gesture, the keypad gets noisy fast.