Tính bằng cách thuận tiện
tính bằng cách thuận tiện
18,5 x 9,35 + 9.65 x 18.5 + 18,5 1,5 giờ x 4 + 7 x 1,5 giờ - 90 phút
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18,5 x 9,35 + 9.65 x 18.5 + 18,5 1,5 giờ x 4 + 7 x 1,5 giờ - 90 phút
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