It is mentioned in the problem that Michelle made a jewelry box with equal size, then we can further analyze that it is a square box on which all sides are equal. Therefore, on the kind of problem, we can solve for the area of the square box using the formula area is equal to a² (A=a²) where "a" is the measurement of the side.
3 3 9
_ x __ =___
1 10 10
first, change 3 to 3/1 to make multiplying easier. then multiply both fractions(3*3=9,1*10=10) and you get 9/10! this can not be simplified.
