The fruit farmer intends to pack and transport a bunch of pears harvested, and the number of kilograms in each box is the same. The first car was loaded with 10 boxes, and the second car was loaded with 6 boxes and 20 kilograms, which was just finished. The kilograms of the second car of pears just account for (2/5) of the pile of pears. How many kilograms are there in this pile of pears?
果农把收获的一堆梨打算装箱运输，每箱的千克数相同．第一车装运10箱，第二车装了6箱又20千克，正好装完．第二车梨的千克数正好占这堆梨的(2/5)．这堆梨共有多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">10 / (3/5)</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">(50/3) * (2/5)</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">(20/3) - 6</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">20 / (2/3)</gadget>
<output>30</output>

<gadget id="calculator">30 * (50/3)</gadget>
<output>500</output>

<result>500</result>