No problem, we've got 1235 and 2163 to multiply
1235 × 2163 = 2163 × (1235)
+ 2163 × 5 what gives us 10815
+ 2163 × 30 producing 64890
+ 2163 × 200 producing 432600
+ 2163 × 1000 that equals 2163000

= 2671305
