No problem, we've got 4991 and 2561 to multiply
4991 × 2561 = 2561 × (4991)
+ 2561 × 1 which equals 2561
+ 2561 × 90 resulting in 230490
+ 2561 × 900 that is equal 2304900
+ 2561 × 4000 that equals 10244000

= 12781951
