大数除法

	public static String bigchars(char[] d,int b){
		int length = d.length;
		char c = d[0];
		int reminder = 0;
		StringBuilder sb = new StringBuilder();
		for(int i = 0; i <= length - 1;i++){
			c = d[i];
			if(c != '.'){
				reminder =  reminder * 10 + (c - '0');
				sb.append(reminder/b);
				reminder = reminder % b;
			}else{
				sb.append(".");
			}
		}
		return sb.toString();
	}