title: cm to inch converter, two textboxes multply a value
body: <p>I Have a problem to make a cm to foot/inch converter in C#, this is what a got:</p>
  
  <pre><code>&lt;asp:textbox id="txtFoot" runat="server"&gt;&lt;/asp:textbox&gt;
  
  &lt;asp:textbox id="txtInches" runat="server"&gt;&lt;/asp:textbox&gt;
  
  &lt;asp:Button id="btnAdd" runat="server" text="Count" onclick="btnAdd_Click" /&gt;
  
  &lt;br /&gt;
  
  &lt;asp:Label ID="lblResult" runat="server"&gt;&lt;/asp:Label&gt;is&lt;asp:Label ID="lblFootAndInches" runat="server"&gt;&lt;/asp:Label&gt;cm    
  &lt;%--I try to get a result "10'1" is 3,939 cm"--%&gt;
  
  protected void btnAdd_Click(object sender, EventArgs e)
  {
      lblResult = (txtFoot.Text + "," + txtInches.Text) * 0,39; //I would like to get 10,1 * 0,39 = 3,939 (10 foot and 1 inch)
      lblFootAndInches = txtFoot.Text + "'" + txtInches.Text + '"'; //I'm looking for a result like 10'1"
  }
  </code></pre>