a

Meter, width is

b

rice

According to the figure 1, it can be listed.

(a+b)？

-

4ab

=

0.0 1

According to Figure 3, it can be listed.

(2a)？

-

4ab

=

0. 12

Get a solution

a

=

0.3

b

=

0.2

The closed shape area (including the square in the middle) is

=

0.5*0.5=0.25

m？

Therefore, floor tiles are needed.

30/0.25

*

four

=

480

Block (excluding small square floor tiles in the middle)