anmol6213/CBM-to-Pieces-converter-for-construction-materials — reverse-engineered prompt

Build me a simple web page that helps construction people convert a material quantity in CBM into the number of pieces needed, mainly for AAC blocks and other similar block products. I want it to feel quick and practical, not overly technical.

The user should be able to enter the block size, like length, width, and height, choose or understand the unit, enter the total volume in cubic meters, and instantly see how many pieces that comes to. It should handle custom sizes too, not just one fixed block type. Please make the result clear and easy to read, and round things in a sensible way so it is useful for real orders.

A clean mobile friendly layout would be great, with simple labels, basic validation, and a reset option. If it makes sense, show the calculation so the user can trust the result. Keep it lightweight and easy to use in a browser. If you need to, look up current examples or formulas online.