Alright, let's work through 9721 times 7511 step by step
9721 × 7511 = 7511 × (9721)
+ 7511 × 1 that is equal 7511
+ 7511 × 20 resulting in 150220
+ 7511 × 700 that is equal 5257700
+ 7511 × 9000 that equals 67599000

= 73014431
