Alright, let's work through 80434172 times 99136425 step by step
80434172 × 99136425 = 99136425 × (80434172)
+ 99136425 × 2 which equals 198272850
+ 99136425 × 70 which equals 6939549750
+ 99136425 × 100 that results in 9913642500
+ 99136425 × 4000 what gives us 396545700000
+ 99136425 × 30000 that results in 2974092750000
+ 99136425 × 400000 that is equal 39654570000000
+ 99136425 × 0000000 what gives us 0
+ 99136425 × 80000000 resulting in 7930914000000000

= 7973956259915100
