I'm going to guess you're converting to feet, because you don't specify in your question. Hope so. First, we need significant figures; 189 cm = 3 sig figs, so, 1 cm = 0.0328ft. 189cm x 0.0328 ft/cm = 6.199, or, with three figures, 6.20 ft. Let's check, shall we? 6.2 / 0.0328 = 189.024, or, with three figures, 189!!! great!
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