I don’t get it . How do you solve it ?

Let us first find the dimensions of the rectangle.
The rectangle is 4 cm by 4 cm.
And since 1 cm = 8 meters, the dimensions in meters are
[tex]4\operatorname{cm}\times\frac{8m}{\operatorname{cm}}=32m[/tex]and
[tex]4\operatorname{cm}\times\frac{8m}{\operatorname{cm}}=32m[/tex]Hence, the dimensions of the tarp in meters are 32 meters by 32 meters; therefore, the area is
[tex]32m\times32m=1024m^2[/tex]Hence, the area of the actual tarp is 1024 square meters.