When you look at the problem . . . . . 5.61 x 3
you know right away that the answer must be bigger than 5.61,
because the problem means taking 5.61 three time.
Also, multiplication can be done in either direction, so the problem
is the same as starting with 3 and taking it 5.6 times, so the result
must be bigger than 3 .
Amy's answer of 1.683 is smaller than 5.61 and also smaller than 3,
so there's no way it can be correct.
