If p=25*343*9/1575, how many digits are in p?  Choose the correct choice from the following choices:
A) 7
B) 2
C) 1
D) 4
E) 3
p = 25 * 343 * 9 / 1575   p = 5^2 * 7^3 * 3^2 / (5^2 * 3^2 * 7)   p = 7 ^ 2   p = 49   Ans: 2
<result>B</result>
If p=25*343*9/1575, how many digits are in p?