$\mathrm{1,000}/\text{watts}=\text{time needed to use}1\text{kWh}$

$\text{watts}/1,000=\text{kilowatt hours}$

$\text{Volume needed}=(\text{medicine dosage required})(\text{weight of drug by volume})$.

Number of games in a single round-robin tournament with $n$ teams is $n(n-1)/2$.

Number of games in a single-elimination tournament with $n$ teams is $(n-1)$.