why is there an unexpected maths result from a float calculation?

[maryab]

One of my students asked why - entering 35 as the input gets a strange answer - see print dollars result. It is strange. The answer should just be 0.35

pennies = int(input('Enter pennies: '))
dollars = pennies * .01
print(f'{pennies} pennies are worth ${dollars:.2f} in dollars')
print(dollars)