Question: User: 2.5 \times 10^{3} =
1. **State the problem:** We need to evaluate the expression $$2.5 \times 10^{3}$$.
2. **Recall the rule:** Multiplying by $$10^{3}$$ means multiplying by 1000 because $$10^{3} = 1000$$.
3. **Perform the multiplication:**
$$2.5 \times 10^{3} = 2.5 \times 1000$$
4. **Calculate the result:**
$$2.5 \times 1000 = 2500$$
5. **Final answer:**
$$2.5 \times 10^{3} = 2500$$