Answer: Hello mate!
The number e is: e = 2.71828
Now, we want to round it to 3 decimal places.
First, let's talk about the round part.
If we have a number of the form x = a.b and we want to round it tho the whole number, we need to analyze the number after the decimal point.
if the number b is smaller than 5, then we round down and x = a
if the number b is 5 or bigger, then we round up and x = a + 1
now, the number in the 3 decimal place is an 8, and we need to see the next number (the fourth place) in this case is a 2, so this means that we need to round down.
e = 2.718
