Alright, let's work through 78825100 times 64795494 step by step
78825100 × 64795494 = 64795494 × (78825100)
+ 64795494 × 0 giving us 0
+ 64795494 × 00 that is equal 0
+ 64795494 × 100 giving us 6479549400
+ 64795494 × 5000 resulting in 323977470000
+ 64795494 × 20000 producing 1295909880000
+ 64795494 × 800000 that equals 51836395200000
+ 64795494 × 8000000 producing 518363952000000
+ 64795494 × 70000000 resulting in 4535684580000000

= 5107511294099400
