This scientific calculator works well and will give you the right answer as long as you enter it correctly. Which can unfortunately be a problem. The buttons on this calculator are weird and I have to press them pretty hard to get them to register correctly. On a more positive note this thing is very durable. It has literally been thrown across a room and survived without a scratch. The screen is OK, but there are better displays available on similarly priced scientific calculators. Both the Casio fx-300ES and the TI-30XS Multiview are similar calculators with better buttons and more modern screens. Both calculators cost within $2 of this one as well. This calculator will work, but I'd recommend going for one of the other two which do the same thing just better.