3,100,000,000 km divided by 1.6 = 1.94 billion miles
4.7 billion km is 2,920,444,603.515 miles.
2 billion miles.
7.5 billion kilometers = ~4.7 billion miles.
5.2 billion km is 3,231,129,200 miles.
2 billion miles = 3,218,688,000 km
Answer: 4,000,000,000 mi. = 6,437,376,000 km
5.1 billion km is ~3.2 (3.16899) billion miles.
4.5 billion km = ~2.8 billion miles.
Nine billion miles equates to 14,484,096,000 km
4.7 billion km equates to 2,920,443,700 miles.
Planet Neptune is 2.80 billion miles (4.50 billion km) from the sun.
3.67 billion miles = 5,906,292,480 km