This sum looks awfully familiar

Calculus Level 1

\[ \large \displaystyle \sum_{n=0}^\infty \frac1{n!} = 1 + \frac11 + \frac1{1\cdot2} + \frac1{1\cdot2\cdot3} + \ldots \]

What is the value of the summation above? Give your answer to 3 decimal places.

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