Format coefficients of the derivative of a function

The following code is meant to output the derivative of a function but the coefficients are displayed as fractions even when I try to change the format to short or long.

syms x

e = 2.718282; 
f = x * e^x^2; 

format short
diff(f) 

The output is a function whose coefficients are the ratios of large integers. How can their format be changed?

Answer 1

[Ameer Hamza]

Convert everthing to symbolic to prevent the loss of precision

syms x
e = exp(sym(1));
f = x * e^x^2; 
format short
df = diff(f)

Result

>> df
df =
exp(2*x) + 2*x*exp(2*x)

[Aleem Andrew]

Thank you for your help