Print decimal numbers with python

Question

I have some troubles when creating a cost report, which should contain costs with decimal points.
Bellow is a list with example costs. When I print the cost to the console (or export to a file), some of the values do not appear as expected.

import decimal
li = [
    {
        "cost": 0E-10
    },
    {
        "cost": 0.0000400000
    },
    {
        "cost": 1.000*0.00005
    },
]

for c in li:
    print(f"Cost: {round(decimal.Decimal(c['cost']), 10)}")

# Cost: 0E-10
# Cost: 0.0000400000
# Cost: 0.0000500000

As seen in the output, the first value is displayed as 0E-10 instead of 0.
How could I achieve to get all the time decimal numbers printed?