Since 1 British Pound is equal to 262.305833818 Sri Lankan Rupees, we could say that n British Pounds are equal to 262.305833818 times n Sri Lankan Rupees. In other words, we could use the following formula:
Sri Lankan Rupees = British Pounds x 262.305833818
For example, let's say that we want to convert 2 British Pounds to Sri Lankan Rupees. Then, we just replace British Pounds in the abovementioned formula with 2:
Sri Lankan Rupees = 2 x 262.305833818
That is, 2 British Pounds are equal to 524.611667636 Sri Lankan Rupees.