Since 1 British Pound is equal to 18.1798659363 South African Rand, we could say that n British Pounds are equal to 18.1798659363 times n South African Rand. In other words, we could use the following formula:
South African Rand = British Pounds x 18.1798659363
For example, let's say that we want to convert 2 British Pounds to South African Rand. Then, we just replace British Pounds in the abovementioned formula with 2:
South African Rand = 2 x 18.1798659363
That is, 2 British Pounds are equal to 36.3597318726 South African Rand.