Alright, let's work through 77127813 times 66562089 step by step
77127813 × 66562089 = 66562089 × (77127813)
+ 66562089 × 3 that equals 199686267
+ 66562089 × 10 yielding 665620890
+ 66562089 × 800 giving us 53249671200
+ 66562089 × 7000 that equals 465934623000
+ 66562089 × 20000 that equals 1331241780000
+ 66562089 × 100000 giving us 6656208900000
+ 66562089 × 7000000 what gives us 465934623000000
+ 66562089 × 70000000 resulting in 4659346230000000

= 5133788353281357
