Your balance is $0.30000000004
Good example of a leaky abstraction. JavaScript developers almost never have to worry about or completely understand the intricacies of floating-point arithmetic, until errors like this happen. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Leaky_abstraction" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Leaky_abstraction</a>