A batch of goods was transported in three times, 30% of all the goods were transported in the first time, 21 tons more than the first time in the second time, the ratio between the second time and the third time was 9:5, and the total How many tons?
一批货物分三次运完，第一次运走全部货物的30%，第二次比第一次多运走21吨，第二次和第三次的比是9：5，这批货物共有多少吨？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">21 * (5/9)</gadget>
<output>35/3 = around 11.666667</output>

<gadget id="calculator">21 + (35/3)</gadget>
<output>98/3 = around 32.666667</output>

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

<gadget id="calculator">(3/10) * 2</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/10) * (5/9)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (3/5) - (1/6)</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">(98/3) / (7/30)</gadget>
<output>140</output>

<result>140</result>