A simple Pendulum word problem?

The square of the period of a pendulum, T varies directly with the length of the pendulum, L and inversely with the acceleration due to gravity, g.

a) Determine the equation for g.

b) Given the period of the pendulum to be 2.4s, for a pendulum length og 1.4m and a g value of 9.8m/s^2. Determine a value for k.

My work so far::

a) T^2 = kL

and

T^2 = k / Ag {Ag is accelation due to gravity}

Ag = k / (T^2)

b)

T^2 = k /Ag

2.4^2 = k / 9.8

56.448 = k

But the problem is the k value is no where close if I use the length in the first equation (T^2 = kL)..

Help?? :S