All 5-digit zip codes in the United States are assigned by region. In Arkansas, all zip codes begin with the number 7 while the second digit is restricted to numbers from 1 to 2. The third number is restricted to numbers from 6 to 9. There is no restriction on the remaining digits. How many zip code combinations are possible in Arkansas? The correct answer is 800. How do you get that answer?

I just need the steps on how to get the answer please!