Alright, let's work through 42830509 times 8249308 step by step
42830509 × 8249308 = 8249308 × (42830509)
+ 8249308 × 9 what gives us 74243772
+ 8249308 × 00 that is equal 0
+ 8249308 × 500 yielding 4124654000
+ 8249308 × 0000 that is equal 0
+ 8249308 × 30000 that is equal 247479240000
+ 8249308 × 800000 giving us 6599446400000
+ 8249308 × 2000000 producing 16498616000000
+ 8249308 × 40000000 yielding 329972320000000

= 353322060537772
