No problem, we've got 7871 and 3505 to multiply
7871 × 3505 = 3505 × (7871)
+ 3505 × 1 giving us 3505
+ 3505 × 70 that is equal 245350
+ 3505 × 800 producing 2804000
+ 3505 × 7000 giving us 24535000

= 27587855
