simple distance, duration and pace calculator

this is the worlds simplest calculator for runners, walkers, bikers etc. absolutely no crap or freaking mambo-jambo, just change two of the values to calculate the third.
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Simple running pace, distance and duration calculator / Lihtne jooksu tempokalkulaator. Arvuta distants, tempo, aeg. no hassle simple basic easy running pace time distance duration calculator. lihtne kerge jooks jooksmine jooksu tempo kalkulaator tempokalkulaator.