Alright, let's work through 3523 times 7157 step by step
3523 × 7157 = 7157 × (3523)
+ 7157 × 3 resulting in 21471
+ 7157 × 20 that is equal 143140
+ 7157 × 500 that equals 3578500
+ 7157 × 3000 that is equal 21471000

= 25214111
