Imagine what 12 Billion dollars is.
The AVERAGE of workers generates something like 1-1.2 million dollars worth of labor in one lifetime of labor. (Under the current value of labor in a capitalist society)
A billion dollars is the LIFETIME of work of about 830-1000 humans. Their entire life's contribution working. So 12 billion dollars is potentially the lifetime labor of 12 thousands lives.
Now let's assume you work for 50 years of your life (which is pretty low in today's world). And also have a 40 hour work week (also kind of low compared to what a lot of ppl have to do to survive).
That's 2,080 hour of work a year. 50 years for a lifetimes work. 12 thousand lifetimes of work. By this somewhat rough and impromptu estimation what she stole equates to 1.2 billion hours of work.