In a room with an area of 12 m2, lay a square floor tile with a side length of 14 cm. How many such tiles do you need at least? Why do you do this?

In a room with an area of 12 m2, lay a square floor tile with a side length of 14 cm. How many such tiles do you need at least? Why do you do this?

12 / (0.14 * 0.14) is about 613