No problem, we've got 4000 and 3177 to multiply
4000 × 3177 = 3177 × (4000)
+ 3177 × 0 what gives us 0
+ 3177 × 00 what gives us 0
+ 3177 × 000 giving us 0
+ 3177 × 4000 that equals 12708000

= 12708000
