Shikaku — Quick rules

Goal of the game

Divide the entire grid into rectangles. Each clue gives the area of the rectangle that must contain it.

Every cell belongs to exactly one rectangle: no gaps and no overlaps.
Rectangle edges follow the grid lines. A square is allowed; an L-shape is not.
Each rectangle contains exactly one clue, and its area — width × height — must equal that clue.
The clue can appear anywhere inside its rectangle. A clue of 1 must form a one-cell rectangle.