We're going to solve 78189377 multiplied by 72258254
78189377 × 72258254 = 72258254 × (78189377)
+ 72258254 × 7 which equals 505807778
+ 72258254 × 70 yielding 5058077780
+ 72258254 × 300 giving us 21677476200
+ 72258254 × 9000 yielding 650324286000
+ 72258254 × 80000 what gives us 5780660320000
+ 72258254 × 100000 which equals 7225825400000
+ 72258254 × 8000000 producing 578066032000000
+ 72258254 × 70000000 which equals 5058077780000000

= 5649827863367758
