No problem, we've got 8158 and 8641 to multiply
8158 × 8641 = 8641 × (8158)
+ 8641 × 8 that equals 69128
+ 8641 × 50 what gives us 432050
+ 8641 × 100 what gives us 864100
+ 8641 × 8000 resulting in 69128000

= 70493278
