There is a batch of table salt in the warehouse. After 35% of the total amount is shipped out, another 240 tons are shipped in. At this time, the table salt in the warehouse is just 25% more than the original table salt. How many tons of table salt is there in the warehouse?
仓库有一批食盐，运出了总数的35%后，又运进240吨，这时仓库里的食盐恰好比原有食盐多25%，仓库原有食盐多少吨？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (7/20)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">(5/4) - (13/20)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">240 / (3/5)</gadget>
<output>400</output>

<result>400</result>