There is a batch of chemical fertilizer in the warehouse. After transporting away (1/5), another 300 tons are transported in. At this time, the fertilizer is 130% of the original fertilizer. How many tons of chemical fertilizer are transported away?
仓库里有一批化肥，运走(1/5)后，又运进300吨，这时化肥是原来化肥的130%，运走化肥多少吨？
<gadget id="calculator">130 / 100</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(13/10) - (4/5)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">300 / (1/2)</gadget>
<output>600</output>

<gadget id="calculator">600 * (1/5)</gadget>
<output>120</output>

<result>120</result>