8吋幾公分. 8吋等於20.32公分. 算法: 8 * 0.3937 = 20.32公分. 9.7 吋幾公分. 9.7吋 ... 11.81102. 31, 12.20472. 32, 12.59843. 33, 12.99213. 34, 13.38583. 35, 13.77953.
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