Approx 1.5*1014 miles.
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440 light years = 2.58653992 × 1015 miles
15 miles equals 24 kilometres
1 kilometer equals 0.621 miles so 0.621 times 20 equals 12.42 miles.
0.435 miles
3.26 light years equals 3.08413226 × 10^13 kilometers.