Alright, let's work through 20200306 times 76710761 step by step
20200306 × 76710761 = 76710761 × (20200306)
+ 76710761 × 6 resulting in 460264566
+ 76710761 × 00 that equals 0
+ 76710761 × 300 producing 23013228300
+ 76710761 × 0000 which equals 0
+ 76710761 × 00000 that equals 0
+ 76710761 × 200000 giving us 15342152200000
+ 76710761 × 0000000 giving us 0
+ 76710761 × 20000000 yielding 1534215220000000

= 1549580845692866
