Sophie germain in 1815, sophie germain won a mathematical prize given by the institut de france for her work on the theory of elasticity. the prize was a medal made of 1 kilogram of gold. how much is the medal worth today in u. s. dollars and in euros? to you solve this problem, you need to know a few things. first, gold is measured in troy ounces which are a little larger than a regular ounce. there are 32.150747 troy ounces in a kilogram of gold. second, the price of gold today (12/3/19) is $1,471.30 per troy ounce. third, the exchange rate today for dollars and euros is 1 us dollar is 0.9 euros.