I wondered at first about this Glenda Legoon and wracked my brains to recall if I should know her.
Same happened to me, with equally disappointing outcome.
And put away that calculator and get the whizz wheel out
Totally agree. Now is the time to use it.
Finally a word of my own, well remembered from my instructor when I made my first such efforts: if you begin to see a vast expense of water, it might well be you are approaching the sea. Check your compass to get an idea which sea it might be then decide in which direction to turn.