The current exchange rate is approximately 1 US dollar (USD) equal to 0.3850 Omani rials (OMR). Therefore, 7 US dollars would be equivalent to about 2.70 Omani rials. This conversion is based on the real-time exchange rate data which may fluctuate slightly due to market changes. If you need an exact or updated rate, checking a currency converter or financial service at the time of transaction is advisable. But as of now, 7 USD ≈ 2.70 OMR.