A foot is 12 inches, so 2.6 feet is 31.2 inches. An inch is about 2.54 cm, so that comes to about 79.2 cm.
To put it another way, 1 foot=12 x 2.54 or 30.48 cm
therefore 2.6feet is 2.6*30.48=79.2cm to 3 significant digits
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