The scoop holds 100 pearls, and the empty container on the
scale weighs one pound before the pearls are added. Roll your
cursor over the scoop to dump the pearls onto the scale and
see how much 100 pearls weigh (note that the dish weighs 1
pound).
So now you know that 100 pearls weighs 1 pound. If you could
only get one more piece of information in order to determine
how many pearls are in the chest, what would be the best piece
of information to get?