On the first day of the journey, the Skipper sailed his ship halfway to the destination by traveling due east for 20 hours at a speed of 30 kilometers per hour, and then turned the ship's engines off to let them cool down. But while the engines were off, a wind storm blew his vessel backward in a westward direction.  After the storm, the Skipper used his GPS device to determine the new location of the ship, and he discovered that he was only one-third of the way to his destination.  How many kilometers had the ship been blown in a westward direction by the storm?
Traveling 20 hours due east at 30 kilometers per hour, the ship sailed 20*30=
<gadget id="calculator">20*30</gadget>
<output>600</output>
600 kilometers the first day.
If half the distance to the destination is 600 kilometers, then 2*600=
<gadget id="calculator">2*600</gadget>
<output>1_200</output>
1200 kilometers is the total distance from start to destination.
One-third of the distance from start to destination is 1/3 * 1200 = 
<gadget id="calculator">1200/3</gadget>
<output>400</output>
400 kilometers.
Thus, the wind storm blew the ship in a westward direction for 600 - 400 = 
<gadget id="calculator">600-400</gadget>
<output>200</output>
200 kilometers.

<result>200</result>