using solve command does not return a single simplified soln

I am using the command solve however instead of returning a single number (which is possible because I can do it by hand) it returns 'some value1 + some value2'

w=63000;
s = 1j*w;
A = 0.3;
B = 8e-8;
C = 7e-5; 
D = 3.5;

syms Kp Ki x

Gs=A*s/(B*s^2+C*s+D)

PI=Kp + Ki/s

eqn = x -pi/2 + angle(Gs) == 2*pi/3

soln = solve(eqn,x)

soln =

(7*pi)/6 + 7011494199134999/4503599627370496

the problem is that if I try and operate on 'soln' I dont get a simplified answer...how can I get matlab to simplify that answer into 1 number?

for example: tan(soln)

ans =

tan((7*pi)/6 + 7011494199134999/4503599627370496)

Answer 1

[Jake G]

I figured it out, using double(x) worked