Alright, let's work through 51801608 times 82385891 step by step
51801608 × 82385891 = 82385891 × (51801608)
+ 82385891 × 8 that is equal 659087128
+ 82385891 × 00 resulting in 0
+ 82385891 × 600 that equals 49431534600
+ 82385891 × 1000 giving us 82385891000
+ 82385891 × 00000 which equals 0
+ 82385891 × 800000 which equals 65908712800000
+ 82385891 × 1000000 that results in 82385891000000
+ 82385891 × 50000000 producing 4119294550000000

= 4267721630312728
