Here is the question Use the Maclaurin expansion of e^x to find the value e of correct to four decimal places

here is the series

e^x=1+x+(x^2)/2!+...

here is the answer

Answer is 2.7183

Problem

Whilst I obviously have the answer, and I have the sequence to follow, I cannot see how the answer is derived from the series, nor can I reproduce the answer on my calculator (ti89 using solve)

Can someone please point out thru the progression how the answer is achieved. Thanks