What should happen when you add float and packed datatype values?

REPORT  ZDATATYPES.

data :

          xyz type f VALUE '123',

          pqr type p VALUE 12.

data : t type f.

t = xyz + pqr.

write :  t.

"OUTPUT

1,3500000000000000E+02

Why the o/p comes with trailing zeroes? Is there a way to remove it without changing their datatypes?