81 output missing for print statement in units chapter

[Scottan]

Resolves #81

Added output for print statements. Tweaked numbers for some calculations so the output is cleaner

[github-actions]

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Rendered Changes

🔍 Inspect the changes: https://github.com/UoMResearchIT/programming_with_python/compare/md-outputs..md-outputs-PR-93

The following changes were observed in the rendered markdown documents:

 06-units_and_quantities.md | 39 +++++++++++++++++++++++++++++++++++----
 md5sum.txt                 |  2 +-
 2 files changed, 36 insertions(+), 5 deletions(-)

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⏱️ Updated at 2026-04-21 17:18:12 +0000

[andrewgait]

Looks good to me - approved.