Clocks+to+the+Ceiling?

How many of these clocks set end to end would it take to reach this 8 foot ceiling?
media type="custom" key="27655642" Low Guess Clock Responses

media type="custom" key="27655766" High Guess Clock Responses

media type="custom" key="27655798" Just Right Guess Responses

Height of the Clock Measurement

media type="custom" key="27662180" With Measurement Responses