No problem, we've got 2321 and 1510 to multiply
2321 × 1510 = 1510 × (2321)
+ 1510 × 1 what gives us 1510
+ 1510 × 20 which equals 30200
+ 1510 × 300 that results in 453000
+ 1510 × 2000 resulting in 3020000

= 3504710
