Alright, let's work through 9890 times 6449 step by step
9890 × 6449 = 6449 × (9890)
+ 6449 × 0 giving us 0
+ 6449 × 90 that results in 580410
+ 6449 × 800 which equals 5159200
+ 6449 × 9000 yielding 58041000

= 63780610
