No problem, we've got 3121 and 1684 to multiply
3121 × 1684 = 1684 × (3121)
+ 1684 × 1 what gives us 1684
+ 1684 × 20 that results in 33680
+ 1684 × 100 giving us 168400
+ 1684 × 3000 what gives us 5052000

= 5255764
