Alright, let's work through 9981 times 2664 step by step
9981 × 2664 = 2664 × (9981)
+ 2664 × 1 which equals 2664
+ 2664 × 80 that is equal 213120
+ 2664 × 900 giving us 2397600
+ 2664 × 9000 which equals 23976000

= 26589384
