What should I enter for 'length of stay' on my dtv application if I plan to stay longer than 9 months?

When applying for a DTV visa online and unsure of the length of stay to enter, you can consider entering a duration slightly less than 180 days, as many others have done. It's common to input numbers such as 170, 174, or 178 days. While you have prepaid for 9 months of Muay Thai training, and plan to stay longer, it seems that demonstrating a duration close to 180 days is generally acceptable and seems to be a safer option according to other expats.