We're going to solve 5109 multiplied by 3945
5109 × 3945 = 3945 × (5109)
+ 3945 × 9 that is equal 35505
+ 3945 × 00 that equals 0
+ 3945 × 100 that equals 394500
+ 3945 × 5000 resulting in 19725000

= 20155005
