A transport team transports a batch of rice. On the first day, (1/5) of the total number was transported by 60 bags more, and on the second day, (1/4) of the total number was transported by 60 bags less. There are 220 bags left that have not been transported away. How many bags were there in total in this batch of rice?
某运输队运一批大米．第一天运走总数的(1/5)多60袋，第二天运走总数的(1/4)少60袋．还剩下220袋没有运走．这批大米原来一共有多少袋？
<gadget id="calculator">220 - 60</gadget>
<output>160</output>

<gadget id="calculator">60 + 160</gadget>
<output>220</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">220 / (11/20)</gadget>
<output>400</output>

<result>400</result>