No problem, we've got 4084 and 7821 to multiply
4084 × 7821 = 7821 × (4084)
+ 7821 × 4 giving us 31284
+ 7821 × 80 that is equal 625680
+ 7821 × 000 that equals 0
+ 7821 × 4000 yielding 31284000

= 31940964
