No problem, we've got 7871 and 2491 to multiply
7871 × 2491 = 2491 × (7871)
+ 2491 × 1 that is equal 2491
+ 2491 × 70 that is equal 174370
+ 2491 × 800 what gives us 1992800
+ 2491 × 7000 that is equal 17437000

= 19606661
