With 4, 5, 6 and 7, which two digit multiplication formula can these four numbers form? What are the minimum product and the maximum product?

With 4, 5, 6 and 7, which two digit multiplication formula can these four numbers form? What are the minimum product and the maximum product?

It can be composed of:
45×67
45×76
46×57
46×75
47×56
47×65
54×67
54×76
56×74
57×64
64×75
65×74
The smallest product is
46×57=2622
The smallest product is
65×74=4810