For a batch of goods, (1/4) of the total number is transported for the first time, and 30% of the total number is transported for the second time, leaving 27 tons. How many tons are there in total for this batch of goods?
一批货物，第一次运走总数的(1/4)，第二次运走总数的30%，还剩下27吨，这批货物共有多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">27 / (9/20)</gadget>
<output>60</output>

<result>60</result>