Alright, let's work through 80278891 times 52453542 step by step
80278891 × 52453542 = 52453542 × (80278891)
+ 52453542 × 1 yielding 52453542
+ 52453542 × 90 yielding 4720818780
+ 52453542 × 800 what gives us 41962833600
+ 52453542 × 8000 resulting in 419628336000
+ 52453542 × 70000 yielding 3671747940000
+ 52453542 × 200000 that equals 10490708400000
+ 52453542 × 0000000 that is equal 0
+ 52453542 × 80000000 which equals 4196283360000000

= 4210912180781922
