Alright, let's work through 16695721 times 80587364 step by step
16695721 × 80587364 = 80587364 × (16695721)
+ 80587364 × 1 that is equal 80587364
+ 80587364 × 20 producing 1611747280
+ 80587364 × 700 giving us 56411154800
+ 80587364 × 5000 giving us 402936820000
+ 80587364 × 90000 which equals 7252862760000
+ 80587364 × 600000 producing 48352418400000
+ 80587364 × 6000000 that results in 483524184000000
+ 80587364 × 10000000 resulting in 805873640000000

= 1345464145469444
