Excel 2007 : Multi-variable values, conditions

Hi guys!

Could you tell me the proper formatting for multiple conditions:

In cell A1 I want to type in values; I want cell B1 to generate a corresponding figure.

For example:

If A1=0 then I want B1 to show 50; if A1=0.1, I want B1 to show 51.6; if A1=0.2, I want B1 to show 53.2, etc.

Thanks in advance! Sorry about the lack of proper terminology!