Since 1 US Dollar is equal to 1.313002 Singapore Dollars, we could say that n United States Dollars are equal to 1.313002 times n Singapore Dollars. In other words, we could use the following formula:
Singapore Dollars = United States Dollars x 1.313002
For example, let's say that we want to convert 2 United States Dollars to Singapore Dollars. Then, we just replace United States Dollars in the abovementioned formula with 2:
Singapore Dollars = 2 x 1.313002
That is, 2 United States Dollars are equal to 2.626004 Singapore Dollars.