No problem, we've got 1636 and 5163 to multiply
1636 × 5163 = 5163 × (1636)
+ 5163 × 6 that equals 30978
+ 5163 × 30 yielding 154890
+ 5163 × 600 that is equal 3097800
+ 5163 × 1000 that is equal 5163000

= 8446668
