Mingming's room is a rectangle with a length of 4 meters and a width of 3 meters. How many pieces of floor tiles do you need at least? one 1 1 2 decimeters 1 Right angle 1.1 2 decimeters My painting is not standard

Mingming's room is a rectangle with a length of 4 meters and a width of 3 meters. How many pieces of floor tiles do you need at least? one 1 1 2 decimeters 1 Right angle 1.1 2 decimeters My painting is not standard

4 meters divided by 2 decimeters = 20
3 meters divided by 2 decimeters = 15
20 * 15 * 2 = 600 pieces