There is a batch of goods in the shopping mall. On the first day, 1/4 of the total quantity was transported away, and 40% of the total quantity was transported away on the second day, plus 4 tons. At this time, a total of 56 tons were transported away. How many tons is this shipment?
商场里有一批货，第一天运走了总数的(1/4)，第二天运走了总数的40%多4吨，这时共运走了56吨．这批货物共多少吨？
<gadget id="calculator">56 - 4</gadget>
<output>52</output>

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

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/4) + (2/5)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">52 / (13/20)</gadget>
<output>80</output>

<result>80</result>