Alright, let's work through 85840187 times 17346849 step by step
85840187 × 17346849 = 17346849 × (85840187)
+ 17346849 × 7 what gives us 121427943
+ 17346849 × 80 which equals 1387747920
+ 17346849 × 100 producing 1734684900
+ 17346849 × 0000 which equals 0
+ 17346849 × 40000 which equals 693873960000
+ 17346849 × 800000 what gives us 13877479200000
+ 17346849 × 5000000 what gives us 86734245000000
+ 17346849 × 80000000 yielding 1387747920000000

= 1489056762020763
