Final answer:
In the DEA Number Verification Formula, the second step is to add together the second, fourth, and sixth digit and multiply this sum by two.
Step-by-step explanation:
In the DEA Number Verification Formula, the second step is to add together the second, fourth, and sixth digit and multiply this sum by two. For example, if the second, fourth, and sixth digits are 3, 5, and 7 respectively, the calculation would be (3+5+7) * 2 = 30.