Alright, let's work through 9810 times 1398 step by step
9810 × 1398 = 1398 × (9810)
+ 1398 × 0 that equals 0
+ 1398 × 10 that is equal 13980
+ 1398 × 800 that is equal 1118400
+ 1398 × 9000 producing 12582000

= 13714380
