Alright, let's work through 64555943 times 85419330 step by step
64555943 × 85419330 = 85419330 × (64555943)
+ 85419330 × 3 giving us 256257990
+ 85419330 × 40 giving us 3416773200
+ 85419330 × 900 yielding 76877397000
+ 85419330 × 5000 producing 427096650000
+ 85419330 × 50000 yielding 4270966500000
+ 85419330 × 500000 yielding 42709665000000
+ 85419330 × 4000000 that results in 341677320000000
+ 85419330 × 60000000 producing 5125159800000000

= 5514325398578190
