Alter numeric metric format at collection

I recently developed a plug-in for an environmental device withn our datacenter (Sensatronics Senturion). All we're really interested in is the current temp. The problem is, the device is reporting the temperature in centi-degrees(?). For example, when the temperature is 68.2 degrees, the value returned by the trap is "682".

This causes alerts to go out reading something like: "Datacenter is at 702 degrees".

Anyone know of a way to apply any kind of format mask or arithmetic (value * 0.1) to a metric as it's collected?

Thanks,

David