Alright, let's work through 65870020 times 76921991 step by step
65870020 × 76921991 = 76921991 × (65870020)
+ 76921991 × 0 that equals 0
+ 76921991 × 20 resulting in 1538439820
+ 76921991 × 000 that is equal 0
+ 76921991 × 0000 that results in 0
+ 76921991 × 70000 giving us 5384539370000
+ 76921991 × 800000 giving us 61537592800000
+ 76921991 × 5000000 yielding 384609955000000
+ 76921991 × 60000000 producing 4615319460000000

= 5066853085609820
