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The shepherd who had folded his flock with 100 hurdles, and whose master bade him the next day use 16 of these to pen some pigs, and to enclose nine times as many sheep with the remaining 84 as the 100 had contained, had originally placed the hurdles in two rows of 49 each, with one hurdle at each end. He made room for nine times as many sheep within 84 hurdles by arranging them in a square, with 21 on every side, thus increasing the area ninefold.
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