No problem, we've got 1563 and 4315 to multiply
1563 × 4315 = 4315 × (1563)
+ 4315 × 3 what gives us 12945
+ 4315 × 60 resulting in 258900
+ 4315 × 500 that equals 2157500
+ 4315 × 1000 producing 4315000

= 6744345
