How to calculate the amount of work on marble and granite paving

[Student Question] How to calculate the amount of marble and granite paving?

[Answer] The engineering volume of marble and granite is calculated in square meters according to the actual paved area. The area of ​​the column, the wall and the hole other than 0.3 square meters should be deducted, but the area of ​​the door and the empty circle is also increased accordingly.

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