Bulls are so much better at math than the cows. They can
multiply huge integers together and get perfectly precise answers ... or so
they say. Farmer John wonders if their answers are correct. Help him check the
bulls' answers. Read in two positive integers (no more than 40 digits each) and
compute their product. Output it as a normal number (with no extra leading
FJ asks that you do this yourself; don't use a special library function for the multiplication.