Alright, let's work through 80542934 times 7138546 step by step
80542934 × 7138546 = 7138546 × (80542934)
+ 7138546 × 4 producing 28554184
+ 7138546 × 30 giving us 214156380
+ 7138546 × 900 that results in 6424691400
+ 7138546 × 2000 yielding 14277092000
+ 7138546 × 40000 which equals 285541840000
+ 7138546 × 500000 which equals 3569273000000
+ 7138546 × 0000000 resulting in 0
+ 7138546 × 80000000 that equals 571083680000000

= 574959439333964
