No problem, we've got 5136 and 1645 to multiply
5136 × 1645 = 1645 × (5136)
+ 1645 × 6 which equals 9870
+ 1645 × 30 which equals 49350
+ 1645 × 100 resulting in 164500
+ 1645 × 5000 what gives us 8225000

= 8448720
