The mathematical model of cloud computing system based on the queuing system with the splitting of the incoming queries and synchronization of services is considered. The queuing system consists of a single buffer and N servers (N >2), service times are independent and exponentially distributed. The incoming query enters the system as a whole and only before service is divided into subqueries, each subquery is served by its device. The servers with parts of the same query are considered to be employed as long as the query is not serviced as a whole: the query is handled only when the last of it is out and a new query may be served only when there are enough free servers (the response time is the maximum of service times of all parts of this query). Expressions for the stationary performance characteristics of the system are presented.