It is: 12380 = (XII)CCCLXXX in Roman numerals which means 1000*12+300+80 = 12380
12380
Approx 12380 miles.
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100
That is 4800
4198 to the nearest 100 = 4200
100
100
100
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
2500 is already at the nearest 100.