How many pieces of standard ດິນຈີ່ທົນທານ per cubic block?

Standard type refractory brick refers to T3, the size is 230*114*65mm, which can be calculated by the formula: 1/(0.23*0.114*0.065)=588 pieces, this is the number of refractory bricks, if it is masonry, Also add the gray seams between the bricks and so on.