How many solar systems are in the milky way galaxy?

So far, astronomers have found more than 500 solar systemsand are discovering new ones every year. Given how many they have found in our own neighborhood of the Milky Way galaxy, scientists estimate that there may be tens of billions of solar systems in our galaxy, perhaps even as many as 100 billion.

Answerscripps institution of oceanography; i believe this is correct plz check first good luck;