We're going to solve 5823 multiplied by 2151
5823 × 2151 = 2151 × (5823)
+ 2151 × 3 which equals 6453
+ 2151 × 20 that equals 43020
+ 2151 × 800 which equals 1720800
+ 2151 × 5000 giving us 10755000

= 12525273
