No problem, we've got 1720 and 2607 to multiply
1720 × 2607 = 2607 × (1720)
+ 2607 × 0 that is equal 0
+ 2607 × 20 yielding 52140
+ 2607 × 700 what gives us 1824900
+ 2607 × 1000 yielding 2607000

= 4484040
