Need help writing the code for this property tax app

I need help writing this C# code for my computer programming test. I've missed the past 2 classes due to the flu. Can someone please help me write this code??

Part I: Property Tax application
If you own real estate in a particular county, the property tax that you owe each year is calculated as 64 cents per $100 of the property’s value. For example, if the property’s value is $10,000, then the property tax is calculated as follows:
Tax= $10,000 /100 * .64

I also have to attatch the code to a form1design. Please someone help