Alright, let's work through 51121998 times 85827280 step by step
51121998 × 85827280 = 85827280 × (51121998)
+ 85827280 × 8 giving us 686618240
+ 85827280 × 90 that results in 7724455200
+ 85827280 × 900 that equals 77244552000
+ 85827280 × 1000 resulting in 85827280000
+ 85827280 × 20000 that results in 1716545600000
+ 85827280 × 100000 what gives us 8582728000000
+ 85827280 × 1000000 which equals 85827280000000
+ 85827280 × 50000000 which equals 4291364000000000

= 4387662036505440
