One trillion kilometers (km) is the same as about 621,371,190,000 miles.
15 trillion km is 9.32 trillion miles.
39.9 trillion km equals 24,233,476,400,000 miles.
About 9.3 trillion miles.
Approx 24.8 trillion miles.
40 trillion km equates to 24,854,800,000,000 miles.
70 trillion km = 43.5 trillion miles (to 3 sf)
100 trillion km is 62,137,100,000,000 miles.
Light years is not a time, it is a distance. It takes light about 6.025 years to travel 57 trillion km. In other words, 57 trillion km = 6.025 light years.
A billion
39 trillion kilometers = 2.42334765 × 1013 miles.
A trillion is 10 to the power 12 - whether it is kilometres or grams or dollars.
One light year is around 10 trillion km or 6 trillion miles. Nine lightyears would be 90 trillion km or 54 trillion miles. You would generally just say nine lightyears though.