Since 1 US Dollar is equal to 360.422245 Sri Lankan Rupees, we could say that n United States Dollars are equal to 360.422245 times n Sri Lankan Rupees. In other words, we could use the following formula:
Sri Lankan Rupees = United States Dollars x 360.422245
For example, let's say that we want to convert 2 United States Dollars to Sri Lankan Rupees. Then, we just replace United States Dollars in the abovementioned formula with 2:
Sri Lankan Rupees = 2 x 360.422245
That is, 2 United States Dollars are equal to 720.84449 Sri Lankan Rupees.