No problem, we've got 1263 and 3987 to multiply
1263 × 3987 = 3987 × (1263)
+ 3987 × 3 giving us 11961
+ 3987 × 60 producing 239220
+ 3987 × 200 producing 797400
+ 3987 × 1000 that is equal 3987000

= 5035581
