Since 1 US Dollar is equal to 8.159969 Solomon Islands Dollars, we could say that n United States Dollars are equal to 8.159969 times n Solomon Islands Dollars. In other words, we could use the following formula:
Solomon Islands Dollars = United States Dollars x 8.159969
For example, let's say that we want to convert 2 United States Dollars to Solomon Islands Dollars. Then, we just replace United States Dollars in the abovementioned formula with 2:
Solomon Islands Dollars = 2 x 8.159969
That is, 2 United States Dollars are equal to 16.319938 Solomon Islands Dollars.