No problem, we've got 8231 and 2580 to multiply
8231 × 2580 = 2580 × (8231)
+ 2580 × 1 that results in 2580
+ 2580 × 30 what gives us 77400
+ 2580 × 200 what gives us 516000
+ 2580 × 8000 that is equal 20640000

= 21235980
