No problem, we've got 4451 and 1580 to multiply
4451 × 1580 = 1580 × (4451)
+ 1580 × 1 giving us 1580
+ 1580 × 50 yielding 79000
+ 1580 × 400 what gives us 632000
+ 1580 × 4000 which equals 6320000

= 7032580
