= 1.5* 1.5*π-0.64

=2.25π-0.64

The third is the multiplication of three (2.25π-0.64).

6.75π- 1.92

If π is equal to about 3. 14.

The first one is 7.065-0.64=6.425.

The second one is 21.195-1.92 =19.275.