https://gyazo.com/f148d753b8b48713cad5e440324b08ff
the answer is either 5 or 6
Total: 2*2=4, 2*4=8, 2*7=14, 2*9=18
4*2=8. 4*4=16, 4*7=28, 4*9=36
7*2= 14, 7*4=28, 7*7=49, 7*9=63
9*2=18, 9*4=36, 9*7=63 9*9=81
2*7 works, 2*9 works, 4*4 works, 7*2, and 9*2 works.
Thus, \(\boxed{5}\) values.
