Scale a recipe and show the arithmetic

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I want to scale a recipe and show the arithmetic. Calculate ingredient quantities for a new yield while flagging steps that do not scale linearly.

Use these inputs:
Original recipe: [Add original recipe]
Original and target servings: [Add original and target servings]

Create: Scaled ingredient table.
Preserve source rows and units, explain transformations, and show checkable calculations. Do not invent missing data.
Make the result specific enough to use and include a short way to check or improve it.