Alright, let's work through 73720478 times 86423355 step by step
73720478 × 86423355 = 86423355 × (73720478)
+ 86423355 × 8 producing 691386840
+ 86423355 × 70 what gives us 6049634850
+ 86423355 × 400 giving us 34569342000
+ 86423355 × 0000 producing 0
+ 86423355 × 20000 what gives us 1728467100000
+ 86423355 × 700000 that is equal 60496348500000
+ 86423355 × 3000000 that equals 259270065000000
+ 86423355 × 70000000 that is equal 6049634850000000

= 6371171040963690
