Since 1 British Pound is equal to 346.1460429631622 Pakistani Rupees, we could say that n British Pounds are equal to 346.1460429631622 times n Pakistani Rupees. In other words, we could use the following formula:
Pakistani Rupees = British Pounds x 346.1460429631622
For example, let's say that we want to convert 2.0 British Pounds to Pakistani Rupees. Then, we just replace British Pounds in the abovementioned formula with 2.0:
Pakistani Rupees = 2.0 x 346.1460429631622
That is, 2.0 British Pounds are equal to 692.2920859263244 Pakistani Rupees.