We're going to solve 4309 multiplied by 2807
4309 × 2807 = 2807 × (4309)
+ 2807 × 9 that is equal 25263
+ 2807 × 00 yielding 0
+ 2807 × 300 producing 842100
+ 2807 × 4000 producing 11228000

= 12095363
