Since 1 US Dollar is equal to 0.81791 Saint Helena Pounds, we could say that n United States Dollars are equal to 0.81791 times n Saint Helena Pounds. In other words, we could use the following formula:
Saint Helena Pounds = United States Dollars x 0.81791
For example, let's say that we want to convert 2.0 United States Dollars to Saint Helena Pounds. Then, we just replace United States Dollars in the abovementioned formula with 2.0:
Saint Helena Pounds = 2.0 x 0.81791
That is, 2.0 United States Dollars are equal to 1.63582 Saint Helena Pounds.