The towel factory produces a batch of towels and ships them out in three batches. The first shipment is exactly 180 boxes more than the total (1/3). The second shipment is the first (2/5), and the third shipment is 260 boxes. How many boxes are there in this batch of towels?
毛巾厂生产一批毛巾，分三次运出．第一次运出的比总数的(1/3)正好多180箱．第二次运出的是第一次的(2/5)，第三次运出260箱．这批毛巾共有多少箱？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 * (2/5)</gadget>
<output>72</output>

<gadget id="calculator">180 + 72 + 260</gadget>
<output>512</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * (2/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(1/3) + (2/15)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">1 - (7/15)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">512 / (8/15)</gadget>
<output>960</output>

<result>960</result>