Uncle Wang set off from the county seat to Wangzhuang Township to deliver fertilizers. It took 4 hours to go there, 50 kilometers per hour, and 5 hours to return. How far is it from the county seat to Wangzhuang Township?
王叔叔从县城出发去王庄乡送化肥．去的时候用了4小时，每小时行50千米，返回时用了5小时．从县城到王庄乡有多远？
<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<result>200</result>