Need help with bytecode hack

[Lordkien]

Hi, I've been trying to hack this flash game. I exported the .swf file and decompiled it using Sothink Decompiler. However, bytecode is far from familiar to me and I don't know much about it as well as how to deal with. I can change simple values but this is a little too much for me.

Original Source code:

 public function set coin(param1:Number) : void
        {
            this._coin = param1;
            return;
        }// end function

Raw data:

public function set coin(param1:Number) : void
        {
1  0 207//f1 03 
_as3_debugfile "C:\Documents and Settings\mymaji\Adobe Flash Builder  4\SanGuo_MVC_Beauty_1_27_VN\src;com\powmen\sanguo\mvc\model\vo;PlayVo.as"
//f0 cf 01 
_as3_debugline line number: 207
//d0 
_as3_getlocal <0> 
//30 
_as3_pushscope 
//ef 01 0b 00 cf 01 
_as3_debug 1, 11, 0, 207
//f0 d1 01 
_as3_debugline line number: 209
//d0 
_as3_getlocal <0> 
//d1 
_as3_getlocal <1> 
//68 18 
_as3_initproperty com.powmen.sanguo.mvc.model.vo:PlayVo::_coin
//f0 d2 01 
_as3_debugline line number: 210
//47 
_as3_returnvoid 
        }// end function

-> bytecode: f1 03 f0 cf 01 d0 30 ef 01 0b 00 cf 01 f0 d1 01 d0 d1 68 18 f0 d2 01 47

Intending to modify to:

this._coin = param1*2;

Or

this._coin = 87654;

I used Cheat Engine and found the above bytecode but don't know how to change it into what I want. Please help.