A batch of goods is transported by car. How many days will it take to transport this batch of goods (1/13) every day? How many days will it take to ship this batch of goods every day (2/9)?
汽车运一批货物，每天运这批货物的(1/13)，几天可以运完？每天运这批货物的(2/9)，几天可以运完？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 / (2/9)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>