For a 10-kilometer road, I walked 4 kilometers in the first hour and 3 kilometers in the second hour. If I want to finish the journey in the third hour, how much do I need to walk?
10公里的路，第一个小时走了4公里，第二个小时走了3公里，如果第三个小时要走完，需要走几分之几？
<gadget id="calculator">10 - 4 - 3</gadget>
<output>3</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>