yeah, seems they mixed up the amount of gold and the amount of ore.
According to experts quoted by RIA Novosti, each ton of ore contains an average of just six ounces of gold.
With gold prices at $1,708 an ounce, the ships would presumably be carrying over $7.17 million worth of gold.
700 tons of ore times 6oz = 4200 times $1708 = $7,173,600,