I need to users to enter a time in one format, convert it to another, perform a calculation, then bring it back again
<p>I am building an app that will convert swimming times from yards to meters, and can't figure out some important stuff.</p>

<p>I need a user to enter a time as this: <code>minutes:seconds.hundredths</code><br>
But it has to come to me in milliseconds, so that I can perform the conversion.  After that I need to put it back into that format and display it to the user.</p>

<p>For example, if someone swam a 200 yard Freestyle in 1:52.43, I need to figure out how to multiply it by 1.11 and add 3.2 seconds, then display it to the user as their converted time for a 50 meter length pool.</p>
