A batch of vegetables was shipped from the vegetable market, sold (2/5) of the total on the first day, sold 40 kg more than the first day on the second day, and sold (3/25) of the total on the third day, just sold out , how many kilograms are there in total for this batch of vegetables?
菜场运来一批蔬菜，第一天卖出总数的(2/5)，第二天卖出的比第一天多40千克，第三天卖出总数的(3/25)，正好卖完，这批蔬菜共有多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (2/5) - (2/5) - (3/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">40 / (1/20)</gadget>
<output>800</output>

<result>800</result>