There is a batch of goods in the market. On the first day, (1/2) of the total amount was shipped, and on the second day, 4 tons more than the total amount (1/3) was shipped. At this time, there are still 20 tons left. How many tons are there in total for this batch of goods? ?
商场上有一批货，第一天运走了总数的(1/2)，第二天运的比总数的(1/3)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 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 - (1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">24 / (1/6)</gadget>
<output>144</output>

<result>144</result>