If you would like to know how much gold was recovered, you can calculate this using the following steps:
1 gold bar: 2 2/5 pounds = 12/5 pounds
2 gold bar: 1 2/3 = 5/3 times as much as the first ... 5/3 * 12/5 pounds = 5/3 * 12/5 = 4 pounds
12/5 pounds + 4 pounds = 12/5 + 20/5 = 32/5 = 6 2/5 pounds
The correct result would be 6 2/5 pounds.