Alright, let's work through 80696437 times 63580237 step by step
80696437 × 63580237 = 63580237 × (80696437)
+ 63580237 × 7 producing 445061659
+ 63580237 × 30 that is equal 1907407110
+ 63580237 × 400 that equals 25432094800
+ 63580237 × 6000 which equals 381481422000
+ 63580237 × 90000 that equals 5722221330000
+ 63580237 × 600000 that equals 38148142200000
+ 63580237 × 0000000 producing 0
+ 63580237 × 80000000 which equals 5086418960000000

= 5130698589515569
