Alright, let's work through 78858231 times 69171628 step by step
78858231 × 69171628 = 69171628 × (78858231)
+ 69171628 × 1 what gives us 69171628
+ 69171628 × 30 giving us 2075148840
+ 69171628 × 200 producing 13834325600
+ 69171628 × 8000 that is equal 553373024000
+ 69171628 × 50000 that is equal 3458581400000
+ 69171628 × 800000 yielding 55337302400000
+ 69171628 × 8000000 producing 553373024000000
+ 69171628 × 70000000 that equals 4842013960000000

= 5454752219470068
