Alright, let's work through 9960 times 6040 step by step
9960 × 6040 = 6040 × (9960)
+ 6040 × 0 that is equal 0
+ 6040 × 60 producing 362400
+ 6040 × 900 that is equal 5436000
+ 6040 × 9000 that results in 54360000

= 60158400
