MATLAB: I dont know what is this answer

Question

From the matlab, i got the below answer. But what is 'e' mean??

I wanna change the below to real number. Thanks

3.2959e+29

Answer 1

The value is too big to show "real number"

>> a=1000
a =
        1000
>> format ShortEng
>> a
a =
     1.0000e+003