The post office is (8/9) kilometers away from the postman’s Uncle Zhang’s home, and (3/5) kilometers away from the Zidong residential area. It takes (1/20) hours for Uncle Zhang to ride from home to the post office to work, and he picks it up from the post office How long will it take for the mail to arrive at the Zidong residential area at the same speed?
邮局与邮递员张叔叔家相距(8/9)千米，与紫东居民区相距(3/5)千米，张叔叔从家骑车去邮局上班需要(1/20)小时，他从邮局领取邮件后以同样的速度到达紫东居民区要多少时间？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(8/9) / (1/20)</gadget>
<output>160/9 = around 17.777778</output>

<gadget id="calculator">(3/5) / (160/9)</gadget>
<output>27/800 = around 0.03375</output>

<result>27/800 = around 0.03375</result>