Alright, let's work through 9840 times 8534 step by step
9840 × 8534 = 8534 × (9840)
+ 8534 × 0 that results in 0
+ 8534 × 40 that is equal 341360
+ 8534 × 800 which equals 6827200
+ 8534 × 9000 that equals 76806000

= 83974560
