7. Find the maximum length of the square tile

Aravind wants to cover the rectangular floor with square tiles. The dimensions of the wall is 4.5 $m$ and 3.9 $m$. Find the maximum length of the square tile, and the number of tiles required to cover the rectangular floor.

 

 

Maximum length of the square tile $=$  $cm$

 

Number of tiles required to cover the floor $=$