No problem, we've got 1688 and 4356 to multiply
1688 × 4356 = 4356 × (1688)
+ 4356 × 8 producing 34848
+ 4356 × 80 what gives us 348480
+ 4356 × 600 yielding 2613600
+ 4356 × 1000 that equals 4356000

= 7352928
