Yes, but trying to calculate in LSD while nicely stoked on LSD would surely be an interesting way to pass the time. One of my younger colleagues informs me that she can't do anything involving mental effort while on ecstacy. She seemed unimpressed with my rejoinder that I often have problems with or without mind-altering substances - with the sole exception of caffeine.

Still - what's wrong with twelve pence to the shilling, twenty shillings to the pound and twenty-one to the guinea? It was only 1967 when we changed in New Zealand. I remember it all very well ...

The idiot also known as Capfka ...