A single bean seems to weigh about 1.25 grams using some of the numbers of wikipedia (they don't list it precisely, and you can get a rather wide range 0.8-1.75 depending on what numbers you use to estimate..). I found a bag of ~362 beans (493 grams) for $12 online, about 3.3 cents per bean! Currently, 0.62kg of gold is worth $26600 or 802,433 beans! That's 3209% as many beans as before. Interesting how much things change.