No problem, we've got 3902 and 5471 to multiply
3902 × 5471 = 5471 × (3902)
+ 5471 × 2 that equals 10942
+ 5471 × 00 what gives us 0
+ 5471 × 900 that equals 4923900
+ 5471 × 3000 producing 16413000

= 21347842
