Write these steps: 

Think these reasons: 
Write the given expression. 

The first step is to write the given expression. Now we start to evaluate the expression. First we check if all units are in SI notation. The unit km is not SI. Therefore the next step is to convert km to m. 
Convert unit km to m. 

We check again, if all units are in SI notation. The unit h is not SI. Therefore the next step is to convert h to s. 
Convert unit h to s. 

The next step is a division. 
Add. 

The next step is an addition. 
Divide. 

Finally, we indicate that this is the answer. 
Underline the answer. 

