[NO GBP] Apply multiplier correctly when transferring reagents. (#79084)

## About The Pull Request
- Fixes #79083 

The multiplier should be applied per reagent volume & not on the
requested amount as a whole.

## Changelog
🆑
fix: cryo and stuff that transfers reagents with a multiplier should
transfer correct volumes as expected.
/🆑

code/datums/components/plumbing/reaction_chamber.dm

@@ -30,7 +30,7 @@
 
 		//compute how much more is needed and round it
 		diff = chamber.required_reagents[required_reagent] - present_amount
-		if(diff >= CHEMICAL_QUANTISATION_LEVEL * 10) //should be safe even after rounding
+		if(diff >= 0.01)
 			process_request(min(diff, MACHINE_REAGENT_TRANSFER), required_reagent, dir)
 			return