No problem, we've got 84390939 and 75609381 to multiply
84390939 × 75609381 = 75609381 × (84390939)
+ 75609381 × 9 producing 680484429
+ 75609381 × 30 that is equal 2268281430
+ 75609381 × 900 yielding 68048442900
+ 75609381 × 0000 giving us 0
+ 75609381 × 90000 producing 6804844290000
+ 75609381 × 300000 that equals 22682814300000
+ 75609381 × 4000000 that results in 302437524000000
+ 75609381 × 80000000 giving us 6048750480000000

= 6380746659798759
