Question: simplify the expression $-2d \times 7y=$
1. **State the problem:** Simplify the expression $-2d \times 7y$.
2. **Recall the multiplication rule:** When multiplying terms, multiply the coefficients (numbers) and then multiply the variables.
3. **Multiply the coefficients:** $-2 \times 7 = -14$.
4. **Multiply the variables:** $d \times y = dy$.
5. **Combine the results:** The simplified expression is $-14dy$.
**Final answer:** $-14dy$