The history book weighs approximately 442.26 grams
Here, we want to convert from a unit to another
We want to convert from ounce to grams
To do this, we need to know the conversion factor
Mathematically, 1 ounce measures approximately 28.35 grams
Thus, 15.6 ounces will weigh 28.35 * 15.6 = 442.26 grams
