No problem, we've got 1561 and 3645 to multiply
1561 × 3645 = 3645 × (1561)
+ 3645 × 1 giving us 3645
+ 3645 × 60 giving us 218700
+ 3645 × 500 producing 1822500
+ 3645 × 1000 that is equal 3645000

= 5689845
