No problem, we've got 3900 and 7684 to multiply
3900 × 7684 = 7684 × (3900)
+ 7684 × 0 what gives us 0
+ 7684 × 00 that equals 0
+ 7684 × 900 yielding 6915600
+ 7684 × 3000 resulting in 23052000

= 29967600
