I cannot tell you how much area it COVERS, but I can tell you how much it has SPREAD:
25 m2 / 1/6 hr = 150 m2 / hr
150 m2 / hr * 2 hr = 300 m2
So we know that it spreads 25 square meters every 1/6 of an hour. That's 10 minutes.
So 25 meters PER 10 minutes.
2 hours = 120 minutes.
120 / 10 = 12.
25 * 12 = 300 meters.