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3 5/8 * 2 1/3 - 2 1/3 * 5/8 - 7 * 5/8 = 29/8 * 7/3 - 7/3 * 5/8 - 7 * 5/8 = 7/3 * (29/8 - 5/8) - 7 * 5/8 = 7/3 * 24/8 - 7 * 5/8 = 7/3 * 3 - 7 * 5/8 = 7 - 7 * 5/8 = 7 * (1 - 5/8) = 7 * (8/8 - 5/8) = 7 * 3/8 = 21/8 = 2 5/8.