Calculation: 10.3 crore × 63.8% = 10.3 × 0.638 = 6.5714 crore ≈ 6.6 crore (when rounded to nearest tenth crore).

Under Emperor Ashoka, the Mauryan Empire extended across the entire Indian subcontinent from the Himalayas to the Deccan Plateau, covering regions in all directions.

While Dinabandhu Mitra depicted the Indigo Revolt through his play 'Nil Darpan', the actual revolts were against indigo planters. The movement occurred in Bengal and Bihar regions against exploitative indigo cultivation.

Patna was known as Pataliputra during the Mauryan period. It was established as the capital by Chandragupta Maurya and became one of the largest cities in the ancient world.

Rajgir (Rajagriha) is mentioned frequently in Buddhist texts as a place where Buddha spent considerable time. It was the capital of the Magadha empire under King Ajatashatru.

Bihar shares the India-Nepal border in its northern region. West Champaran and East Champaran districts have significant sections of the Bihar-Nepal international boundary.

The Ashoka Rock Edict XIII, which contains his famous Kalinga War message and the conversion of Ashoka to Buddhism, is located at Rajgir in Bihar, an ancient city with Buddhist significance.

The statue of Manjushree in Vaishali is one of the tallest statues in Bihar, standing approximately 22 meters high. It was constructed to commemorate the Buddhist heritage of the region.

Megasthenes, the Greek ambassador, wrote in his Indica about Pataliputra (modern Patna) being one of the greatest and most prosperous cities in the ancient world during the Mauryan period.

The terracotta seals and artifacts found at Vaishali bear Brahmi script, which is one of the earliest writing systems used in ancient India during the pre-Mauryan and Mauryan periods.