Of course, danielinva's process is more precise.
Although you really should calculate the range, not just one value.
There's always ways to make brewing more complicated.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk