At its introduction, the real was defined to be equal to 1 unidade real de valor (URV, "real value unit") a non-circulating currency unit. At the same time the URV was defined to be worth 2,750 cruzeiros reais, which was the average exchange rate of the U. S. dollar to the cruzeiro real on that day. As a consequence, the real was worth exactly one U. S. dollar as it was introduced. Combined with all previous currency changes in the country's history, this reform made the new real equal to 2. 75 × 1018 (2. 75 quintillion) of Brazil's original "réis".