No problem, we've got 84842386 and 8048587 to multiply
84842386 × 8048587 = 8048587 × (84842386)
+ 8048587 × 6 what gives us 48291522
+ 8048587 × 80 resulting in 643886960
+ 8048587 × 300 yielding 2414576100
+ 8048587 × 2000 resulting in 16097174000
+ 8048587 × 40000 producing 321943480000
+ 8048587 × 800000 giving us 6438869600000
+ 8048587 × 4000000 which equals 32194348000000
+ 8048587 × 80000000 resulting in 643886960000000

= 682861325008582
