No problem, we've got 1556 and 1663 to multiply
1556 × 1663 = 1663 × (1556)
+ 1663 × 6 what gives us 9978
+ 1663 × 50 that results in 83150
+ 1663 × 500 which equals 831500
+ 1663 × 1000 giving us 1663000

= 2587628
