Since 1 US Dollar is equal to 0.820286 Saint Helena Pounds, we could say that n United States Dollars are equal to 0.820286 times n Saint Helena Pounds. In other words, we could use the following formula:
Saint Helena Pounds = United States Dollars x 0.820286
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 0.820286
That is, 2.0 United States Dollars are equal to 1.640572 Saint Helena Pounds.