No problem, we've got 8423 and 7859 to multiply
8423 × 7859 = 7859 × (8423)
+ 7859 × 3 giving us 23577
+ 7859 × 20 that is equal 157180
+ 7859 × 400 producing 3143600
+ 7859 × 8000 that is equal 62872000

= 66196357
