The concentration of a kind of brine is 25%, using 2000 grams of salt, how many grams of water should be added to prepare this kind of brine? What is the column
一种盐水的浓度是25%，用2000克盐，配制这种盐水需加水多少克？列式为多少
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2_000 / (1/4)</gadget>
<output>8_000</output>

<gadget id="calculator">8_000 - 2_000</gadget>
<output>6_000</output>

<result>6_000</result>