The current difficulty of the network is approximately 125 billion, meaning that on average you need to calculate 125 billion hashes to find a block. At 200 hashes per second, you can expect to find a block in 125,000,000,000 / 200 = 625 million seconds. That's 20 years.
Now of course you could get lucky and find a block on your first hash but the probability of that happening is extremely low.
You would probably be better off mining to a pool - if you find a pool with a minimum payment of 0.01 XMR, you could expect to receive 0.01 XMR in about 15 weeksdays (your difficulty for that payment will be 125 billion x 0.01 XMR / 5.15 XMR, where 5.15 is the average current block reward).