I'm not sure what we're looking at. I've never seen soil tests that high -- and the title hints at it being an analysis of compost. I suppose compost might actually be 7,000 ppm P (or P₂O₅...don't get me started).

If this is an analysis of compost that you intend to apply to a field, you wouldn't need to multiply it by anything. If this is a set of soil test results, well, let's say you won't be needing any fertilizer for quite some time!