Answer:
  t = 6,485 s
,  t_step = 25.94 s
the elephant gives 2.3 step very minute
Explanation:
Let's approximate this system to a simple pendulum that has angular velocity
             w = √L / g
Angular velocity and period are related
            w = 2π / T
            T = 2π √g / L
Let's find the period
            T = 2π √9.8 / 2.3
            T = 12.97 s
Stride time is
            t = T / 2
            t = 12.97 / 2
            t = 6,485 s
Frequency is inversely proportional to period
             f = 1 / t
             f = 1 / 6,485
             f = 0.15 Hz
Since the elephant has 4 legs and each uses a time t, the total time for one step is
             t_step = 4 t
             t_step = 4 6.485
             t_step = 25.94 s
              f_step = 1/t_step =0.0385 s-1
 
Now let's use a proportion rule to find the number of steps in 60 s
            #_step = 60 / t_step
            #__step = 60 / 25.94
            #_step = 2.3 steps
So the elephant gives 2.3 step very minute