Alright, let's work through 1340 times 9993 step by step
1340 × 9993 = 9993 × (1340)
+ 9993 × 0 that results in 0
+ 9993 × 40 that is equal 399720
+ 9993 × 300 resulting in 2997900
+ 9993 × 1000 that results in 9993000

= 13390620
