No problem, we've got 4671 and 1621 to multiply
4671 × 1621 = 1621 × (4671)
+ 1621 × 1 giving us 1621
+ 1621 × 70 that equals 113470
+ 1621 × 600 that is equal 972600
+ 1621 × 4000 what gives us 6484000

= 7571691
