She might have confused the measures or perhaps had a problem with the tools she used to measure it, given that in order to measure 3.696 ml, she would have to use micropipets (normal pipetts go until 0.5 ml min), and given that she was cooking she probably used another tool.
The reasoning itself was good, if she wanted to triple the sause she should add 3 times the red hot pepper sause she usually used (other brand might be more spicy)
