Calculating Velocity

A plane traveled east for 2.5 hours at a velocity of 200 km/min. What was the total distance covered?

$\begin{array}{rcll} 200\ \frac{ \text{km} } {\text{min.}} \cdot 2.5\ \text{h} \cdot \ \frac{ 60\ \text{min.} } { 1\ \text{h}} &=& 200 \cdot 2.5\ \text{km}\\ &=& 500\ \text{km}\\ \end{array}$