The power is given by:

where W is the work and t is the time.
We know that the work done is related to the gravitational potential energy by:

where yf is the final height of the object and y0 is the initial height.
Now, in this case we have a total of 1576 steps, each of them with a height of 0.2 meters that means that the total height gained is:

This in turns means that the work done is:
![W=(70\operatorname{kg})(9.8(m)/(s^2))(315.2m)=216227.2\text{ J}]()
Now, the time it takes to achieve this is 9 minutes 33 seconds, this is the same as:

Finally we use the power formula:

Now we need to remember that 1 Hp is equal to 745.7 W, then we have that this is the same as:

Therefore the power to make that climb is 377.36 W or 0.506 Hp