No problem, we've got 8378147 and 99719507 to multiply
8378147 × 99719507 = 99719507 × (8378147)
+ 99719507 × 7 which equals 698036549
+ 99719507 × 40 producing 3988780280
+ 99719507 × 100 producing 9971950700
+ 99719507 × 8000 that results in 797756056000
+ 99719507 × 70000 giving us 6980365490000
+ 99719507 × 300000 producing 29915852100000
+ 99719507 × 8000000 producing 797756056000000

= 835464688413529
