Log suggestion

I love the "calculate" funtion in the training logs.  Sometimes I run in unfamiliar places and have no idea how far I've run.  But since I hold a pretty regular pace, I can estimate the distance.  Since Distance = Rate x Time, maybe BT can allow the 'calculate' button to calculate the missing item?  That is, if one puts in a time and a pace, it would calculate the distance.  This would be useful for running and OWS where all you might now is time and pace.

~Mike