How do you convert $13$ pounds to ounces?

Hint:Pounds and Ounces are the units of mass, pounds are represented by lbs and ounces are represented by oz. In order to convert pounds into ounces, one should know the relation between them that is how many pounds equals one ounce or how many ounces equals a pound.

Here is the relation between pounds and ounces
$1lbs\; = \;16oz$ where lbs and oz are the respective units of pounds and ounces.

Complete step by step solution:
For solving this type of conversion questions, you need to know about
several units of physical quantities and also the conversional relation between the units. As
we can see that in this question pounds and ounces are given. Let us take a bit and know about pounds and ounces.
Pounds and ounces are the units of mass and are represented by lbs and oz respectively.
The relation between pounds and ounces can be written as
$1lbs\; = \;16oz$
That is one pound equals $16$ ounces.
Now to convert $13$ pounds into ounces, we need to use this relation
Since one pound equals $16$ ounces
Then $13$ pounds will be equal to $16$ times $13$ ounces
Let us understand this mathematically,
$
1lbs = 16oz \\
\Rightarrow 13lbs = 13 \times 16oz \\
\Rightarrow 13lbs = 208oz \\
$
Therefore, we have converted $13lbs$ into ounces which is equals to $208oz$

Note: Whenever you tackle this type of conversion questions, you need to know about the conversion formula and the unit representation of the units too. Because sometimes in questions, only the unit representation are written instead of the name of the unit, so it is necessary for you to learn conversational relations as well as the representation too.