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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="txt_opr1" placeholder="Operand 1" runat="server" Enabled="False"></asp:TextBox><br><br>
        <asp:TextBox ID="txt_opr2" placeholder="Operand 2" runat="server" Enabled="False"></asp:TextBox><br><br>
        <asp:TextBox ID="txt_res" placeholder="Result" runat="server" Enabled="False"></asp:TextBox><br><br>
        <asp:Button ID="nine" runat="server" Text="9" OnClick="nine_Click" />&nbsp
        <asp:Button ID="eight" runat="server" Text="8" OnClick="eight_Click" />&nbsp
        <asp:Button ID="seven" runat="server" Text="7" OnClick="seven_Click" />&nbsp
        <asp:Button ID="plus" runat="server" Text="+" OnClick="plus_Click" BorderStyle="Solid" Width="30px" /><br><br>
        <asp:Button ID="six" runat="server" Text="6" OnClick="six_Click" />&nbsp
        <asp:Button ID="five" runat="server" Text="5" OnClick="five_Click" />&nbsp
        <asp:Button ID="four" runat="server" Text="4" OnClick="four_Click" />&nbsp
        <asp:Button ID="minus" runat="server" Text="-" OnClick="minus_Click" BorderStyle="Solid" Width="30px" /><br><br>
        <asp:Button ID="three" runat="server" Text="3" OnClick="three_Click" />&nbsp
        <asp:Button ID="two" runat="server" Text="2" OnClick="two_Click" />&nbsp
        <asp:Button ID="one" runat="server" Text="1" OnClick="one_Click" />&nbsp
        <asp:Button ID="multi" runat="server" Text="*" OnClick="multi_Click" BorderStyle="Solid" Width="30px" /><br><br>
        <asp:Button ID="btn_submit" runat="server" Text="Calculate" OnClick="btn_submit_Click1" Width="87px" />&nbsp
        <asp:Button ID="div" runat="server" Text="/" OnClick="div_Click" BorderStyle="Solid" Width="30px" /><br><br>
    </div>
    </form>
</body>
</html>