Length x Width ÷ 900 = Number of "cai" (Taiwanese unit of area) Enter the length and width of the window to automatically calculate the "cai" count

【About Measurement】

Please note that the tape measure's hook may be loose, and each tape measure may have discrepancies during measurement. There may also be slight errors during cutting. The "silicone sealant" on the edges of doors and windows is mostly uneven; please include all silicone areas when measuring.