We're going to solve 6440 multiplied by 6228
6440 × 6228 = 6228 × (6440)
+ 6228 × 0 yielding 0
+ 6228 × 40 that is equal 249120
+ 6228 × 400 resulting in 2491200
+ 6228 × 6000 what gives us 37368000

= 40108320
