The Numbers Man

For the first time he can remember, India's richest film-maker is having trouble with his math. Specifically, how 600,000 goes into 175. The first figure is the population of Dharavi, Asia's most populous slum, which he's currently exploring. The second is the number of hectares Dharavi covers in Bombay, an area half the size of New York City's Central Park. In a different life, Shekhar Kapur spent seven years crunching numbers as a corporate planner for a multinational oil company. He surveys the tiny one-room lean-tos where teeming families live shoulder to shoulder in spaces that double as hole-in-the-wall shops, goat...