The multiplication part doesn’t matter as long as you know that the whole grid makes up the 2.3 acres. All you are left to do is shade 0.4 of the whole thing. For every 10 units 4 of them will be shaded.
A is the answer: It forces the boys to let go of some of society's conventions.
I know because I just took the test.
The figurative language is simile
An apple grove and his nighbor (weirdly) grew pine trees....