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42,000,000 grains is about 6,500 times as heavy as a Football (American)
In other words, it's 6,620.6896551720 times the weight of a Football (American), and the weight of a Football (American) is 0.0001510416666667 times that amount.
(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 6,125 grains and 6,562.50 grains. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
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