Question: How many stored does the American fast food restaurant franchise that sponsored Subway 400 have? 

Context paragraphs:
Nirula's: Nirula's is India's oldest fast food restaurant chain.  Based in North India and most popular in NCR Delhi, it was Delhi's first fast food restaurant, opening in Connaught Place in 1977.  Today it has over 70 outlets in NCR Delhi, Bihar, Haryana, Madhya Pradesh, Punjab, Rajasthan and Uttar Pradesh states, offering a “Desi” version of Western fast food items.  Nirula's success has led them to branch out into other ventures which include, ‘Potpourri’, an Indian cuisine, casual dining restaurant chain; ‘Nirula's 21’, ice cream parlour chain, in addition to pastry shops and two hotels in Noida and Panipat.  Recently Nirula's opened its first franchise in Patna, their first outlet in the entire east zone.

Herb Peterson: Herbert Ralph "Herb" Peterson (January 5, 1919 – March 25, 2008) was an American fast food advertising executive and food scientist most known for being the inventor of the McDonald's Egg McMuffin in 1972.  The breakfast business that he pioneered with this item had grown to an estimated $4–5 billion in annual revenues for the fast food restaurant chain McDonald's by 1993.

Fatburger: Fatburger Inc. is an American fast casual restaurant chain.  Its tagline is "The Last Great Hamburger Stand".  While it is a fast food restaurant, the food is cooked and made to order.  Some Fatburger restaurants have a liquor license, as well as Fat Bars.  Its franchise headquarters are in Beverly Hills, California.  In addition to the United States, the chain operates in 19 other countries.

Fast food in China: Western-style fast food in China is a recent phenomenon, dating back only to January 1984 when McDonald's opened its first outlet in Taipei, Taiwan Province in the Republic of China.  In October 1987, Kentucky Fried Chicken, still the most popular fast food chain in China, established its first restaurant in the People's Republic of China (mainland area), located in Beijing.  KFC was later followed by McDonald's, which remains China's number two foreign fast food option.  In addition to American style fast food, China has many local options, including a slew of restaurants that attempt to imitate fast food, particularly KFC.

Subway 400: The Subway 400 was the second race of the NASCAR Winston Cup Series season until 2004, held a week after the Daytona 500.  This 400-mile (644 km) annual race was sponsored by Subway and was held at North Carolina Speedway ("The Rock") since 1966.  From 1966 to 1995, a 500-mile (805-km) race was held; the race was known as the Peach Blossom 500 (1966), the Carolina 500 (1967–1985), and the Goodwrench 500 (1986–1995).  In 1996, the race was shortened to its current distance of 400 miles; the 400 mile race was called the Goodwrench Service 400 (1996–1997), the GM Goodwrench Service Plus 400 (1998), the Dura Lube/Big K 400 (1999), the Dura Lube/Kmart 400 (2000), the Dura Lube 400 (2001), and the Subway 400 (2002–2004).

Fast food restaurant: A fast food restaurant, also known as a quick service restaurant (QSR) within the industry, is a specific type of restaurant that serves fast food cuisine and has minimal table service.  The food served in fast food restaurants is typically part of a "meat-sweet diet", offered from a limited menu, cooked in bulk in advance and kept hot, finished and packaged to order, and usually available for take away, though seating may be provided.  Fast food restaurants are typically part of a restaurant chain or franchise operation that provisions standardized ingredients and/or partially prepared foods and supplies to each restaurant through controlled supply channels.  The term "fast food" was recognized in a dictionary by Merriam–Webster in 1951.

Subway (restaurant): Subway is a privately held American fast food restaurant franchise that primarily sells submarine sandwiches (subs) and salads. Subway is one of the fastest-growing franchises in the world and, as of June 2017, has approximately 45,000 stores located in more than 100 countries.  More than half of the stores are located in the United States.  It is the largest single-brand restaurant chain and the largest restaurant operator in the world.

Spizzico: Spizzico is an Italian franchise quick-service pizza restaurant chain, which belongs to the company Autogrill operating worldwide.  There are currently 169 restaurants in Italy, Greece, Switzerland, France and the United States.  Typical locations include motorways, airports, railway stations, high streets, shopping malls and trade fairs. Often Spizzico restaurants share the same building with other fast food restaurant chains run by Autogrill.  Spizzico's staple are slices of large pizzas (far larger than the regular pizzeria-served or home delivered ones) which are sold in one-eights, -fourths or halves with a variable number of dressings (some fixed, some seasonal, some special), along with pizza slices calzones, fried panzerotti and other fast food fares such as fries, soft drink, salads, and desserts are available.  Meals can be eaten in the restaurant or take-away.

Restaurant Brands International: Restaurant Brands International is a Canadian multinational fast food company.  Formed in 2014 by the $12.5 billion merger between American fast food restaurant chain Burger King and the Canadian coffee shop and restaurant chain Tim Hortons, and expanded by the 2017 purchase of Louisiana-based and themed Popeyes Louisiana Kitchen, the company is the third-largest operator of fast food restaurants in the world.  The company is based alongside Tim Hortons in Oakville, Ontario, but both chains retain their existing operations and headquarters in Oakville and Miami respectively.  The merger focused primarily on expanding the international reach of the Tim Hortons brand, and providing financial efficiencies for both companies.

List of Burger King products: When the predecessor of international fast food restaurant chain Burger King (BK) first opened in 1955, its menu predominantly consisted of hamburgers, French fries, soft drinks, milkshakes, and desserts.  After being acquired by its Miami, Florida franchisees and renamed in 1954, BK began expanding its menu by adding the Whopper.  The company did not add another permanent hamburger to its menu until the introduction of the Big King sandwich in 1996 in response to McDonald's Big Mac sandwich.  The company began experimenting with premium hamburgers, made from higher quality ingredients, in 1978 with the introduction of its Specialty Sandwich product line.  The products were some of the first designed by a fast food restaurant chain that were intended to capture the adult market, members of which would be willing to spend more on a higher-quality product.  However, it wasn't until 2002 when the company began to work on a premium burger in earnest.  On the value side, Burger King first started offering sliders to its menu in the mid-1980s and offered them off and on for the next twenty years.

Supporting paragraphs: Subway 400 Subway (restaurant)
Answer: 45,000