An opening is 1200 mm wide and 840 mm high. Fit two equal-width inset doors with 3 mm at each outside edge, 4 mm between doors, and 3 mm each at top and bottom. Finished door thickness is 20 mm. No overlap is allowed. These are supplied design clearances, not a hardware standard.
Calculate the finished width of each door in mm. Keep intermediate values unrounded; round the final answer to 4 decimal places if needed.
