Alright, let's work through 5380 times 8420 step by step
5380 × 8420 = 8420 × (5380)
+ 8420 × 0 that results in 0
+ 8420 × 80 that is equal 673600
+ 8420 × 300 what gives us 2526000
+ 8420 × 5000 what gives us 42100000

= 45299600
