1сут = 24ч
____________
(7 * 24 + 6ч) - (4 * 24 + 12)= 174 - 108 = 66 часов = 2сут 18ч
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1сут = 24ч
____________
(7 * 24 + 6ч) - (4 * 24 + 12)= 174 - 108 = 66 часов = 2сут 18ч