Operator cannot be applied to operands of type string and int

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Error 10 Operator '*' cannot be applied to operands of type 'string' and 'int' 

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Line 85:             v1.Text = Convert.ToString(y[0]) + "صوت";.

Line 86:             h1.Text = Convert.ToString(Convert.ToInt32((y[0] / tx) * 100));

Line 857: Image1.Width = Convert.ToInt32(h1.Text * 2);

Line 88:             v2.Text = Convert.ToString(y[1]) + "صوت";

Line 89:             h2.Text = Convert.ToString(Convert.ToInt32((y[1] / tx) * 100));

  int tx = y[0] + y[1] + y[2] + y[3];
            rr1.Text = RadioButton1.Text;
            rr2.Text = RadioButton2.Text;
            rr3.Text = RadioButton3.Text;
            rr4.Text = RadioButton4.Text;
            v1.Text = Convert.ToString(y[0]) + "صوت";
            h1.Text = Convert.ToString(Convert.ToInt32((y[0] / tx) * 100));
            Image1.Width = Convert.ToInt32(h1.Text * 2);
            v2.Text = Convert.ToString(y[1]) + "صوت";
            h2.Text = Convert.ToString(Convert.ToInt32((y[1] / tx) * 100));
            Image2.Width = Convert.ToInt32(h2.Text * 2);
            v3.Text = Convert.ToString(y[2]) + "صوت";
            h3.Text = Convert.ToString(Convert.ToInt32((y[2] / tx) * 100));
            Image3.Width = Convert.ToInt32(h3.Text * 2);
            v4.Text = Convert.ToString(y[3]) + "صوت";
            h4.Text = Convert.ToString(Convert.ToInt32((y[3] / tx) * 100));
            Image4.Width = Convert.ToInt32(h4.Text * 2);
            HttpCookie ck1 = new HttpCookie("vv", "t");
            Response.Cookies.Add(ck1);
            //ck1.Expires = DateAndTime.Now.AddDays(20);
        }