Replying to Chemistry Help (calories)

Okay so i have my final tomorrow so I'm studying at the moment and I'm totaly stuck on this question. I usually hate doing this but i've already searched google and hopefully one of you guys can help me out.

assessment/questiondb/GradedInclude_mc.jsp applicationframework/CommonHeader.jspi applicationframework/contextPath.jspi Since a calorie is defined as the amount of energy required to heat 1 g of water up by 1oC, a Calorie will raise
1 liter (1000 g) of water by 1o C. To what temperature can 2 liters of water at 25oC be
raised with the energy contained in a handful of raisins (25 Calories).

The answer is 37.5oC but I have no idea how to get it.