Alright, let's work through 80372875 times 51361459 step by step
80372875 × 51361459 = 51361459 × (80372875)
+ 51361459 × 5 that equals 256807295
+ 51361459 × 70 yielding 3595302130
+ 51361459 × 800 producing 41089167200
+ 51361459 × 2000 that equals 102722918000
+ 51361459 × 70000 that equals 3595302130000
+ 51361459 × 300000 that equals 15408437700000
+ 51361459 × 0000000 that equals 0
+ 51361459 × 80000000 that results in 4108916720000000

= 4128068124024625
