Alright, let's work through 9986 times 6394 step by step
9986 × 6394 = 6394 × (9986)
+ 6394 × 6 resulting in 38364
+ 6394 × 80 that equals 511520
+ 6394 × 900 resulting in 5754600
+ 6394 × 9000 what gives us 57546000

= 63850484
