how did darius strengthen the Persian empires economy?

Darius implemented several economic reforms that helped strengthen the Persian Empire's economy. These included:

1. Standardizing and minting a new currency to facilitate trade and improve economic stability.

2. Building an extensive road network known as the Royal Road, which connected distant parts of the empire and facilitated trade and communication.

3. Establishing a system of taxation based on land value and production, which provided a stable source of income for the empire.

4. Encouraging the development of agriculture, industry, and trade through various incentives and policies.

5. Establishing a system of weights and measures to standardize trade and ensure fairness.

Overall, Darius's economic policies helped to increase the empire's wealth, improve infrastructure, and promote economic growth.