We're going to solve 8103 multiplied by 7803
8103 × 7803 = 7803 × (8103)
+ 7803 × 3 that is equal 23409
+ 7803 × 00 that results in 0
+ 7803 × 100 resulting in 780300
+ 7803 × 8000 that equals 62424000

= 63227709
