Express 144 pencils in dozen and gross.

Explanation

To express 144 pencils in terms of dozen and gross, we can follow these steps:

### Step 1: Convert pencils to dozens
1. **Understand the relationship**: One dozen equals 12 items.
2. **Calculate the number of dozens**: To convert 144 pencils to dozens, divide the total number of pencils by the number of items in a dozen.

\[
\text{Number of dozens} = \frac{144 \text{ pencils}}{12 \text{ pencils/dozen}} = 12 \text{ dozen}
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