No problem, we've got 1861 and 8121 to multiply
1861 × 8121 = 8121 × (1861)
+ 8121 × 1 that results in 8121
+ 8121 × 60 that equals 487260
+ 8121 × 800 that equals 6496800
+ 8121 × 1000 resulting in 8121000

= 15113181
