There is a batch of rice in the grain depot, 80% of it is transported away for the first time, and the remaining 65% is transported away for the second time. At this time, there are 455 bags of rice left. How many bags of rice are there in the grain depot?
粮库有一批稻谷，第一次运走全部的80%，第二次运走剩下的65%，这时还剩下稻谷455袋，粮库原有稻谷多少袋？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">(1/5) * (13/20)</gadget>
<output>13/100 = around 0.13</output>

<gadget id="calculator">1 - (4/5) - (13/100)</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">455 / (7/100)</gadget>
<output>6_500</output>

<result>6_500</result>