Question: User: $18.2 trillion in scientific notation
1. **State the problem:** Convert $18.2$ trillion into scientific notation.
2. **Understand the value:** $1$ trillion equals $10^{12}$.
3. **Express $18.2$ trillion:**
$$18.2 \times 10^{12}$$
4. **Convert to scientific notation:** The number $18.2$ can be written as $1.82 \times 10^{1}$.
5. **Combine powers of ten:**
$$1.82 \times 10^{1} \times 10^{12} = 1.82 \times 10^{13}$$
6. **Final answer:**
$$18.2 \text{ trillion} = 1.82 \times 10^{13}$$