No problem, we've got 2021 and 3981 to multiply
2021 × 3981 = 3981 × (2021)
+ 3981 × 1 which equals 3981
+ 3981 × 20 that is equal 79620
+ 3981 × 000 that equals 0
+ 3981 × 2000 producing 7962000

= 8045601
