Alright, let's work through 1240 times 3636 step by step
1240 × 3636 = 3636 × (1240)
+ 3636 × 0 yielding 0
+ 3636 × 40 that is equal 145440
+ 3636 × 200 resulting in 727200
+ 3636 × 1000 yielding 3636000

= 4508640
