No problem, we've got 1661 and 3510 to multiply
1661 × 3510 = 3510 × (1661)
+ 3510 × 1 what gives us 3510
+ 3510 × 60 yielding 210600
+ 3510 × 600 what gives us 2106000
+ 3510 × 1000 resulting in 3510000

= 5830110
