The driver picks up the chairman from the company’s home on time every day. One day, the chairman walked to the company an hour earlier, but met the car that came to pick him up halfway, so he arrived at the company 10 minutes earlier than usual. It is known that the car travels 55 kilometers per hour, how many kilometers per hour does the chairman walk?
司机每天准时从公司去董事长家接董事长上班，某天董事长提前1小时步行去公司，结果在中途遇到来接他的汽车，因此比平常提前10分钟到达公司．已知汽车每小时行55千米，求董事长每小时步行多少千米？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 55</gadget>
<output>55/6 = around 9.166667</output>

<gadget id="calculator">(55/6) / 2</gadget>
<output>55/12 = around 4.583333</output>

<result>55/12 = around 4.583333</result>