Alright, let's work through 87422645 times 63309875 step by step
87422645 × 63309875 = 63309875 × (87422645)
+ 63309875 × 5 resulting in 316549375
+ 63309875 × 40 that equals 2532395000
+ 63309875 × 600 which equals 37985925000
+ 63309875 × 2000 which equals 126619750000
+ 63309875 × 20000 giving us 1266197500000
+ 63309875 × 400000 yielding 25323950000000
+ 63309875 × 7000000 producing 443169125000000
+ 63309875 × 80000000 that equals 5064790000000000

= 5534716727119375
