How much gallons of paint do I need to paint my interior wall?

Question

Well, I'm going to start to redecorate my bedroom. And I'll first start out repainting it because plain white is just boring. So I just need to know how much gallons of paint do I really need for my room.

Dimensions :

Height - Over estimate of 8' long

Width x Width - Estimate of 14' x 11

(Excuse me I am not a math whiz D:)

And I'm buying an interior paint that well...Actually

"Spread Rate : 250-400 sq. ft./gal" Or basically how many cans of these. LINK FOR PAINT CAN : http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100198293&N=10000003+90015+527896+4712

Answer 1

id say 1 and a half  so buy too and that's good in case you ever need touch ups  

Answer 2

one gallon should be enough. however, if you apply 2 coats, you may need more than one gallon