No problem, we've got 6655 and 8578 to multiply
6655 × 8578 = 8578 × (6655)
+ 8578 × 5 what gives us 42890
+ 8578 × 50 what gives us 428900
+ 8578 × 600 that equals 5146800
+ 8578 × 6000 that equals 51468000

= 57086590
