Alright, let's work through 12703427 times 77033123 step by step
12703427 × 77033123 = 77033123 × (12703427)
+ 77033123 × 7 resulting in 539231861
+ 77033123 × 20 that results in 1540662460
+ 77033123 × 400 what gives us 30813249200
+ 77033123 × 3000 that is equal 231099369000
+ 77033123 × 00000 resulting in 0
+ 77033123 × 700000 what gives us 53923186100000
+ 77033123 × 2000000 that is equal 154066246000000
+ 77033123 × 10000000 resulting in 770331230000000

= 978584654612521
