Rules & objective
Place 1–N (N is the grid width) once per row and column. Each outlined cage must reach its target using its displayed operation. Subtraction and division use either order. Repeats inside a cage are allowed only when they do not repeat in a row or column.
Controls
Arrows select · Numbers enter · Backspace erases · U undoes
Worked example
A two-cell sum-five cage may use 1 and 4 or 2 and 3, subject to the row and column uniqueness constraints.