Alicia's garden is 6.3 square feet in length and 12.6 square feet in width. tomato plants require 2 square feet of space. how many tomato plants can alicia fit in her garden?

The length and width of the garden can't be measured in "square feet".

If the garden is 6.3 feet long and 12.6 feet wide, then
the area of the garden is

            (6.3 feet) times (12.6 feet) = 79.38 square feet .

If a tomato plant needs 2 square feet of space, then
Alicia's garden has enough area for

                    79.38 / 2 = 39 tomato plants,
                                      with 0.69 square feet of space left over.