No problem, we've got 8460223 and 81256064 to multiply
8460223 × 81256064 = 81256064 × (8460223)
+ 81256064 × 3 what gives us 243768192
+ 81256064 × 20 that equals 1625121280
+ 81256064 × 200 that results in 16251212800
+ 81256064 × 0000 yielding 0
+ 81256064 × 60000 resulting in 4875363840000
+ 81256064 × 400000 producing 32502425600000
+ 81256064 × 8000000 that is equal 650048512000000

= 687444421542272
