Question: How many room did the hotel near  The Fremont Street Experience  have when it opened in 1975?
Context: The El Cortez, a hotel and casino, is a relatively small downtown Las Vegas gaming venue a block from the Fremont Street Experience and Las Vegas Boulevard.  The official marketing slogan has been "Where locals come to play" since the El Cortez has traditionally attracted Las Vegas residents weary of large casinos geared towards tourists.  Slots, table games, and a race and sports book occupy one floor of the main pavilion.  It is one of the oldest casino-hotel properties in Las Vegas having continuously operated at the same Fremont Street location since 1941.  Primarily Spanish Colonial Revival in style, it reflects a 1952 remodel when the facade was modernized.  On February 22, 2013, the structure was placed on the National Register of Historic Places. The Golden Gate Hotel & Casino is located at One Fremont Street in Las Vegas, Nevada, in the United States.  A part of the Fremont Street Experience, it is the oldest and smallest hotel (106 rooms) on the Fremont Street Experience. The Fremont Hotel & Casino is located in downtown Las Vegas, Nevada, on the Fremont Street Experience.  The casino is operated by the Boyd Gaming Corporation. Fremont Street is a street in Las Vegas, Nevada, and is the second most famous street in the Las Vegas Valley after the Las Vegas Strip.  Named in honor of explorer John Charles Frémont and located in the heart of the downtown casino corridor, Fremont Street is (or was) the address for many famous casinos such as Binion's Horseshoe, Eldorado Club, Fremont Hotel and Casino, Golden Gate Hotel and Casino, Golden Nugget, Four Queens, The Mint, and the Pioneer Club. The Fremont Street Experience (FSE) is a pedestrian mall and attraction in Downtown Las Vegas, Nevada.  The FSE occupies the westernmost five blocks of Fremont Street, including the area known for years as "Glitter Gulch," and portions of some other adjacent streets. Downtown Las Vegas (commonly abbreviated as DTLV) is the central business district and historic center of Las Vegas, Nevada.  It is the original townsite and was the gambling district of Las Vegas prior to the Strip, and the area still incorporates downtown gaming.  As the urban core of the Las Vegas Valley, it features a variety of hotel and business highrises, cultural centers, historical buildings and government institutions, as well as residential and retail developments.  Downtown is located in the center of the Las Vegas Valley and just north of the Las Vegas Strip, centered on Fremont Street, the Fremont Street Experience and Fremont East.  The city defines the area as bounded by I-15 on the west, Washington Avenue on the north, Maryland Parkway on the east and Sahara Avenue on the south. The California Hotel and Casino (also known as The Cal) opened in 1975 at a cost of $10 million with a hotel and casino located in Downtown Las Vegas, Nevada near the Fremont Street Experience.  When it opened it had 325 rooms which has since been expanded to 781. Pioneer Club Las Vegas was a casino that opened in 1942 and was located in Downtown Las Vegas, Nevada, at 25 East Fremont Street.  It ceased operating as a casino in 1995, the same year the Fremont Street Experience was completed. "Downtown Las Vegas Area" is the name assigned by the Nevada Gaming Control Board NGCB which includes the Downtown Las Vegas area casinos and the Stratosphere Tower which is located 2 mi from Fremont Street.  The city of Las Vegas uses the term Downtown Gaming for the casinos near the Fremont Street Experience.  The land is part of the 110 acre that were auctioned on May 15, 1905 when the city was founded. The Four Queens Hotel and Casino is located in downtown Las Vegas on the Fremont Street Experience.  The 690-room hotel and 40000 sqft casino is owned and operated by TLC Enterprises, which acquired the property from the Elsinore Corporation in 2003.
Answer: 325