No problem, we've got 4163 and 8440 to multiply
4163 × 8440 = 8440 × (4163)
+ 8440 × 3 what gives us 25320
+ 8440 × 60 that is equal 506400
+ 8440 × 100 resulting in 844000
+ 8440 × 4000 that equals 33760000

= 35135720
