When a nation pegs its currency to a gold standard, the value of its currency is determined by the value of gold at the time. The currency is essentially "backed" by gold, meaning it can be exchanged for an equivalent amount of gold. In this case, the price of gold per unit of currency cannot be adjusted. However, the government can adjust the value of the currency by changing the amount of gold that backs it. For example, if a nation wants to increase the value of its currency, it can increase the amount of gold that backs each unit of currency. Conversely, if it wants to decrease the value of its currency, it can decrease the amount of gold that backs each unit of currency. However, this adjustment must be done carefully as it can have a significant impact on the nation's economy and international trade relationships.