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Math topic: Laying floor tiles
This problem is to find the common divisor:

The greatest common divisor of (27.2, 14.4) is 1.6.

That is, the side length of the floor tile is1.6m..

Quantity: 27.2×14.4÷1.6÷1.6 =153 pieces.

Answer: At least 153 square tiles are needed.

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