Complex sentence: A kilosecond (symbol: ks) is 1000 seconds (16 minutes, 40 seconds), so there are 86.4 kiloseconds in a 24-hour day, and 604.8 kiloseconds in a week.
Split into simpler sentences: A kilosecond (symbol: ks) is 1000 seconds (16 minutes, 40 seconds). In a 24-hour day, there are 86.4 kiloseconds, and 604.8 kiloseconds in a week.