The disciples ask this question to say that there is no way they could afford to buy enough food for this crowd. Alternate translation: "We could not buy enough bread to feed this crowd, even if we had two hundred denarii!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
"200 denarii." The singular form of the word "denarii" is "denarius." A denarius was a Roman silver coin worth one day's wages. (See: [[rc://en/ta/man/translate/translate-bmoney]] and [[rc://en/ta/man/translate/translate-numbers]])