Alright, let's work through 8437970 times 63736278 step by step
8437970 × 63736278 = 63736278 × (8437970)
+ 63736278 × 0 that results in 0
+ 63736278 × 70 that equals 4461539460
+ 63736278 × 900 which equals 57362650200
+ 63736278 × 7000 resulting in 446153946000
+ 63736278 × 30000 resulting in 1912088340000
+ 63736278 × 400000 which equals 25494511200000
+ 63736278 × 8000000 giving us 509890224000000

= 537804801675660
