Alright, let's work through 87921499 times 19794061 step by step
87921499 × 19794061 = 19794061 × (87921499)
+ 19794061 × 9 resulting in 178146549
+ 19794061 × 90 that results in 1781465490
+ 19794061 × 400 what gives us 7917624400
+ 19794061 × 1000 yielding 19794061000
+ 19794061 × 20000 that equals 395881220000
+ 19794061 × 900000 that results in 17814654900000
+ 19794061 × 7000000 giving us 138558427000000
+ 19794061 × 80000000 that equals 1583524880000000

= 1740323514417439
