Alright, let's work through 6433864 times 66496626 step by step
6433864 × 66496626 = 66496626 × (6433864)
+ 66496626 × 4 what gives us 265986504
+ 66496626 × 60 that results in 3989797560
+ 66496626 × 800 that equals 53197300800
+ 66496626 × 3000 producing 199489878000
+ 66496626 × 30000 giving us 1994898780000
+ 66496626 × 400000 producing 26598650400000
+ 66496626 × 6000000 that is equal 398979756000000

= 427830248142864
