The word "denarii" is the plural of "denarius. "AT: "The amount of bread that cost two hundred days' wages." (See: [[rc://en/ta/man/translate/translate-bmoney]])
A loaf of bread is a lump of dough that is shaped and baked. These were probably small dense, round loaves.
# what are these among so many?
This remark appears in the form of a question to emphasize that they do not have enough food to feed everyone. AT: "these few loaves and fishes are not enough to feed so many people!" (See: [[rc://en/ta/man/translate/figs-rquestion]])