To transport a batch of goods, vehicle A transports (1/5) of this batch of goods per hour, and vehicle B transports (2/9) of this batch of goods per hour. How many copies of this batch of goods are left after the two trucks are transported at the same time for 2 hours?
运一批货物，甲车每小时运这批货物的(1/5)，乙车每小时运这批货物的(2/9)．两车同时运2小时后，还剩这批货物的几份之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(1/5) + (2/9)</gadget>
<output>19/45 = around 0.422222</output>

<gadget id="calculator">(19/45) * 2</gadget>
<output>38/45 = around 0.844444</output>

<gadget id="calculator">1 - (38/45)</gadget>
<output>7/45 = around 0.155556</output>

<result>7/45 = around 0.155556</result>