No problem, we've got 9991 and 7946 to multiply
9991 × 7946 = 7946 × (9991)
+ 7946 × 1 that equals 7946
+ 7946 × 90 giving us 715140
+ 7946 × 900 that is equal 7151400
+ 7946 × 9000 giving us 71514000

= 79388486
