A single piece of paper can go a long way in Singapore.
The Singapore 10,000 dollar bill is the largest bank note in circulation in the world. It is worth the equivalent of roughly 8,165 US dollars.
The next largest bank note is 1000 Swiss francs, which is worth roughly 1,060 US dollars.
in circulation: (related to money) in use.
roughly: close to, approximately, about.
equivalent: similar value, the same.