According to police statistics, the most common complaint received by the Metropolitan Police Bureau in 2010 was housebreaking, with 12,347 cases. This was followed by 5,504 cases of motorcycle thefts, 3,694 cases of assault and 2,836 cases of embezzlement. Serious offences included 183 murders, 81 gang robberies, 265 robberies, 1 kidnapping and 9 arson cases. Offences against the state were by far more common, and included 54,068 drug-related cases, 17,239 cases involving prostitution and 8,634 related to gambling. The Thailand Crime Victim Survey conducted by the Office of Justice Affairs of the Ministry of Justice found that 2.7 percent of surveyed households reported a member being victim of a crime in 2007. Of these, 96.1 percent were crimes against property, 2.6 percent were crimes against life and body, and 1.4 percent were information-related crimes.
Question: How many more non-gang robberies were there compared to kidnappings and arson cases combined?
Answer: 255