Alright, let's work through 5407 times 2139 step by step
5407 × 2139 = 2139 × (5407)
+ 2139 × 7 producing 14973
+ 2139 × 00 which equals 0
+ 2139 × 400 that equals 855600
+ 2139 × 5000 what gives us 10695000

= 11565573
