Alright, let's work through 9154 times 9720 step by step
9154 × 9720 = 9720 × (9154)
+ 9720 × 4 resulting in 38880
+ 9720 × 50 producing 486000
+ 9720 × 100 resulting in 972000
+ 9720 × 9000 which equals 87480000

= 88976880
