Alright, let's work through 42351510 times 21599099 step by step
42351510 × 21599099 = 21599099 × (42351510)
+ 21599099 × 0 producing 0
+ 21599099 × 10 what gives us 215990990
+ 21599099 × 500 that results in 10799549500
+ 21599099 × 1000 producing 21599099000
+ 21599099 × 50000 what gives us 1079954950000
+ 21599099 × 300000 which equals 6479729700000
+ 21599099 × 2000000 giving us 43198198000000
+ 21599099 × 40000000 producing 863963960000000

= 914754457289490
