No problem, we've got 7903 and 8157 to multiply
7903 × 8157 = 8157 × (7903)
+ 8157 × 3 that is equal 24471
+ 8157 × 00 what gives us 0
+ 8157 × 900 producing 7341300
+ 8157 × 7000 yielding 57099000

= 64464771
