Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Myanmar (myan-MAR i/minmr/ mee-ahn-MAR, /minmr/ mee-EN-mar or /manmr/ my-AN-mar (also with the stress on first syllable); Burmese pronunciation: [mjma]),[nb 1] officially the Republic of the Union of Myanmar and also known as Burma, is a sovereign state in Southeast Asia bordered by Bangladesh, India, China, Laos and Thailand. One-third of Myanmar's total perimeter of 1,930 km (1,200 miles) forms an uninterrupted coastline along the Bay of Bengal and the Andaman Sea. The country's 2014 census revealed a much lower population than expected, with 51 million people recorded. Myanmar is 676,578 square kilometres (261,227 sq mi) in size. Its capital city is Naypyidaw and its largest city is Yangon (Rangoon).
How much a Myanmar's boundaries are encompassed by beachfront lands?