Alright, let's work through 89958374 times 5620792 step by step
89958374 × 5620792 = 5620792 × (89958374)
+ 5620792 × 4 resulting in 22483168
+ 5620792 × 70 that results in 393455440
+ 5620792 × 300 which equals 1686237600
+ 5620792 × 8000 that results in 44966336000
+ 5620792 × 50000 producing 281039600000
+ 5620792 × 900000 that results in 5058712800000
+ 5620792 × 9000000 that results in 50587128000000
+ 5620792 × 80000000 which equals 449663360000000

= 505637308912208
