Satou seems to be stuck in the parallel world that looks like an amalgamation of the game projects he's worked on. And while his insider knowledge of the world's systems gives him an advantage, he still needs to find his bearings before he can start planning what to do next. To that end, he heads to the nearest city to establish a base of operations.
So that means five large 
copper makes one silver.
إذًا، خمس عملاتٍ نحاسية كبيرة تساوي عملةً فضيّة
Das heißt also, dass 5 Kupferschillinge
einen Silberkreuzer wert sind.
Así que cinco cobres grandes
son una de plata.
Así que cinco cobres grandes
son una de plata.
Une pièce d’argent équivaut donc
à cinq grandes pièces de bronze ?
Quindi cinque monete di rame grandi
sono una moneta d'argento.
Quer dizer que cinco moedas
de bronze são uma de prata.
Получается, что пять больших медяков — 
это один серебряный.