HP42s first major program (Double Integral) Best way to approach?

[DM48]

(05-28-2020 04:06 PM)Werner Wrote:  All correct.
And I thought you needed the final answer *4.. delete the lines if you don't need them.

Cheers, Werner

Werner, I am just trying to understand the program. This is a lot different than RPL. I do need the *4, but wasn't sure why it was included there. I'm still not sure why it is but I am a little slow sometimes.

I will need to adjust the program for diameter entry (divide a, b and c by 2) and wanted to be sure I understood what the program was doing to that point. I am going through the next bit which is giving me trouble understanding.