Một nền nhà hình chữ nhật có kích thước 8 x 10. Người ta muốn lót nền bằng những viên gạch hình vuông giống nhau có cùng chu vi 1.6 m. Tính chi phí để mua gạch vừa lót đủ nền nhà, biết mỗi viên gạch có giá 8300 đồng.

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