The transport team transports a batch of goods, and the tonnage transported away is 1/5 of the total tonnage. The unshipped goods are 12 tons more than the transported goods. How many tons are there in this batch of goods?
运输队运一批货，运走的吨数是总吨数的(1/5)，没有运的比运走的多12吨，这批货物有多少吨？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5) - (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12 / (3/5)</gadget>
<output>20</output>

<result>20</result>