Alright, let's work through 80516602 times 8474435 step by step
80516602 × 8474435 = 8474435 × (80516602)
+ 8474435 × 2 producing 16948870
+ 8474435 × 00 that is equal 0
+ 8474435 × 600 which equals 5084661000
+ 8474435 × 6000 yielding 50846610000
+ 8474435 × 10000 producing 84744350000
+ 8474435 × 500000 that results in 4237217500000
+ 8474435 × 0000000 that equals 0
+ 8474435 × 80000000 yielding 677954800000000

= 682332710069870
