Based on boiling 26.00 gallonsliters at 1.045 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.047. You wanted an OG of 1.048. It looks like it will be under.
47x0,33L Alcohol By Volume: 5.51% Apparent Attenuation: 73% Calories: 188.8 per 12oz bottle Original Gravity: 14.04 °P, 1.057 Final Gravity: 3.83 °P, 1.015