Alright, let's work through 4257371 times 89157547 step by step
4257371 × 89157547 = 89157547 × (4257371)
+ 89157547 × 1 giving us 89157547
+ 89157547 × 70 resulting in 6241028290
+ 89157547 × 300 that equals 26747264100
+ 89157547 × 7000 producing 624102829000
+ 89157547 × 50000 that is equal 4457877350000
+ 89157547 × 200000 producing 17831509400000
+ 89157547 × 4000000 which equals 356630188000000

= 379576755028937
