Help me! The code doesn't work (NO OUTPUT)

Question

Hello, i have a problem with a code of one work of my college, the problem is that:
I need to generate a code that convert the miles to km.
Firstly I need use the "def" function, so that's the code:
def convert_distance(miles):
km= miles * 1.6
convert_distance(55)
print(km)
When I tried to run the code the output is "no output".
In the first I thought that the error is the indentation, but no I fixed this problem and still doesn't work, please if I understand what is the problem, I would greatly appreciate the help. I'm new in this issue and I want a tutor :(.

Answer 1

def convert_distance(miles):
km= miles * 1.6
print(km)
convert_distance(55)

Answer 2

def convert_distance(miles):
return miles * 1.6

km = convert_distance(55)
print(km)

Answer 3

Genuine Stalwart Thank u so much!, I don't know that this is the way to write this code! Thanks!