There is a batch of goods in the market. On the first day, 1/3 of the total amount was shipped, and on the second day, 4 tons more than 40% of the total amount was shipped. At this time, there are still 20 tons left. How many tons are there in total in this batch?
商场上有一批货，第一天运走了总数的(1/3)，第二天运的比总数的40%多4吨，这时还剩20吨，这批货物共有多少吨？
<gadget id="calculator">20 + 4</gadget>
<output>24</output>

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

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

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">1 - (11/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">24 / (4/15)</gadget>
<output>90</output>

<result>90</result>