Teacher Wang Hua is a hiking enthusiast. After walking 5 kilometers in 1 hour on Sunday, it took (2/3) hours to return to the original road. What is the average speed of Wang Hua in the whole journey?
王华师徒步爱好者，星期天他用1小时步行5千米后，原路返回用了(2/3)小时，王华全程的平均速度是多少？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">10 / (5/3)</gadget>
<output>6</output>

<result>6</result>