No problem, we've got 7823 and 3603 to multiply
7823 × 3603 = 3603 × (7823)
+ 3603 × 3 which equals 10809
+ 3603 × 20 giving us 72060
+ 3603 × 800 that is equal 2882400
+ 3603 × 7000 yielding 25221000

= 28186269
