No problem, we've got 4878 and 1561 to multiply
4878 × 1561 = 1561 × (4878)
+ 1561 × 8 that results in 12488
+ 1561 × 70 what gives us 109270
+ 1561 × 800 giving us 1248800
+ 1561 × 4000 giving us 6244000

= 7614558
