Alright, let's work through 85316789 times 19892819 step by step
85316789 × 19892819 = 19892819 × (85316789)
+ 19892819 × 9 that equals 179035371
+ 19892819 × 80 that equals 1591425520
+ 19892819 × 700 producing 13924973300
+ 19892819 × 6000 which equals 119356914000
+ 19892819 × 10000 giving us 198928190000
+ 19892819 × 300000 yielding 5967845700000
+ 19892819 × 5000000 what gives us 99464095000000
+ 19892819 × 80000000 that results in 1591425520000000

= 1697191441238191
