Take your name $($first$,$ last, middle, whichever$)$ and assign points to each letter, where A$=1,$ B$=2,$ C$=3,...,$ Z$=26.$

Take just the first $($left$-$most$)3$ digits. If your name is short $("$Vu$"$ for example$)$ and the total has only $2$ digits, put an extra $"0"$ AT THE END to make it $3$ digits. That's your personal number. It should be between $100$ and $999.$