7. The Shanghai World Expo 2010 opens at 9:00 AM and stops admitting visitors at 8:00 PM. In the flowchart on the right, $S$ represents the total number of visitors reported on the official website of the Shanghai World Expo at each whole hour, and $a$ represents the number of visitors admitted in the 1 hour before the hourly report. Then [Figure] The blank execution box should be filled with $\_\_\_\_$ $\mathrm { S } \leftarrow \mathrm { S } + \mathrm { a }$.
(5 points) A rectangular parallelepiped has length, width, and height of $2 a , a , a$ respectively. All its vertices lie on a sphere. Then the surface area of the sphere is
7. The Shanghai World Expo 2010 opens at 9:00 AM and stops admitting visitors at 8:00 PM. In the flowchart on the right, $S$ represents the total number of visitors reported on the official website of the Shanghai World Expo at each whole hour, and $a$ represents the number of visitors admitted in the 1 hour before the hourly report. Then\\
\includegraphics[max width=\textwidth, alt={}, center]{92627018-2332-482e-855e-1d26e13a1d2f-2_777_335_861_993}
The blank execution box should be filled with $\_\_\_\_$ $\mathrm { S } \leftarrow \mathrm { S } + \mathrm { a }$.