Alright, let's work through 1673643 times 80034810 step by step
1673643 × 80034810 = 80034810 × (1673643)
+ 80034810 × 3 yielding 240104430
+ 80034810 × 40 that is equal 3201392400
+ 80034810 × 600 which equals 48020886000
+ 80034810 × 3000 what gives us 240104430000
+ 80034810 × 70000 what gives us 5602436700000
+ 80034810 × 600000 resulting in 48020886000000
+ 80034810 × 1000000 what gives us 80034810000000

= 133949699512830
