No problem, we've got 1422 and 3645 to multiply
1422 × 3645 = 3645 × (1422)
+ 3645 × 2 that is equal 7290
+ 3645 × 20 yielding 72900
+ 3645 × 400 that results in 1458000
+ 3645 × 1000 that equals 3645000

= 5183190
