I have a Individual class that has the follow code

```
public class Individual {

    static int DNA_lenght = 64;
    private int fitness = 0;

    private byte[] genes = new byte[DNA_lenght];

    public void initialise_individual(){

        for(int i = 0; i < DNA_lenght; i++){

            byte gene = (byte) Math.round(Math.random());
            genes[i] = gene;
        }

    }
}

```

how can I write a method to translate the whole value of the individual into a decimal value?