No problem, we've got 1621 and 4500 to multiply
1621 × 4500 = 4500 × (1621)
+ 4500 × 1 that equals 4500
+ 4500 × 20 producing 90000
+ 4500 × 600 giving us 2700000
+ 4500 × 1000 yielding 4500000

= 7294500
