No problem, we've got 4021 and 1946 to multiply
4021 × 1946 = 1946 × (4021)
+ 1946 × 1 producing 1946
+ 1946 × 20 resulting in 38920
+ 1946 × 000 that results in 0
+ 1946 × 4000 giving us 7784000

= 7824866
