No problem, we've got 2558 and 8039 to multiply
2558 × 8039 = 8039 × (2558)
+ 8039 × 8 which equals 64312
+ 8039 × 50 what gives us 401950
+ 8039 × 500 giving us 4019500
+ 8039 × 2000 resulting in 16078000

= 20563762
