Director Nag Ashwin’s Kalki 2898 AD has turned out to be the biggest box office blockbuster of the year, and now it is all set to complete a month in cinemas. On its 29th day at the box office, the post-apocalyptic epic crossed the whopping Rs 1100 mark in gross worldwide earnings, and the Rs 739 crore gross mark in domestic collections (according to industry tracking website Sacnilk). The nett earnings of Nag Ashwin’s film stand at Rs 623.7 crore domestically, after it earned around Rs 1.5 crore on Thursday.…