Help me fix my html codes

I have multiple forms on my webpage but they are all coming out as big one.
What's going on?
Here are my codes.
First Name: <input type ="text" name="firstname /"><BR/>
Last Name:<input type="text" name="lastname/"><BR/>
Contact Number:<input type="text" name="contactnumber"/><BR/>
Email Address:<input type="text" name=emailaddress"/><BR/>
