self Maths Puzzle

Using all {1,2,3,4,5,6,7,8,9}, complete the following two sets of equations.
[ ] x [ ] = [ ][ ]
[ ][ ] x [ ]=[ ][ ]

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self Other Question

9 8 7 6 5 4 3 2 1 = 99. Insert only plus signs to make correct. ABCCBA = C3A^2

Find the Values for A,B,C??