No problem, we've got 9781 and 8129 to multiply
9781 × 8129 = 8129 × (9781)
+ 8129 × 1 what gives us 8129
+ 8129 × 80 producing 650320
+ 8129 × 700 which equals 5690300
+ 8129 × 9000 yielding 73161000

= 79509749
