We're going to solve 66628837 multiplied by 78320645
66628837 × 78320645 = 78320645 × (66628837)
+ 78320645 × 7 yielding 548244515
+ 78320645 × 30 resulting in 2349619350
+ 78320645 × 800 what gives us 62656516000
+ 78320645 × 8000 that is equal 626565160000
+ 78320645 × 20000 resulting in 1566412900000
+ 78320645 × 600000 which equals 46992387000000
+ 78320645 × 6000000 that results in 469923870000000
+ 78320645 × 60000000 yielding 4699238700000000

= 5218413489439865
