Alright, let's work through 2139 times 5242 step by step
2139 × 5242 = 5242 × (2139)
+ 5242 × 9 that equals 47178
+ 5242 × 30 that is equal 157260
+ 5242 × 100 resulting in 524200
+ 5242 × 2000 which equals 10484000

= 11212638
