Shower Floor Mat

Product name: Bathroom Splice Antiskid Pad
Thickness: 0.9cm
Usage area: bathroom/toilet
Splice pad size: 30x30cm
Aperture: 1.4cm
Single gram weight: 145g
Due to manual measurement, there are some errors, which are subject to the actual object.
An area of 1 square meter requires 11 pieces
How do I calculate the number of full tiles?
[Total bathroom area ÷ Single piece area] If your bathroom is 150cm wide * 200cm long
150x200 ÷ (30x30)~34 pieces