3*999+3+99*8+8+2*9+2+9
=3*(999+1)+8*(99+1)+2*(9+1)+9
=3*1000+8*100+2*10+9
=3829
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3*999+3+99*8+8+2*9+2+9
3*(999+1)+8*(99+1)+2*(9+1)+9
=3000+800+20+9=3829
3*999+3+99*8+8+2*9+2+9=3*(999+1)+8*(99
1)+2*(9+1)+9=3*1000+8*100+2*10+9
3*999+3+99*8+8+2*9+2+9
=3*(999+1)+8*(99+1)+2*(9+1)+9
=3*1000+8*100+2*10+9
=3829