The water content of 1,000 kilograms of green vegetables is 97% in the morning, and the water content of these vegetables is 95% in the afternoon. How many kilograms have the weight of these vegetables been reduced?
1000千克青菜早晨测得它的含水率为97%，这些菜到了下午测得含水率为95%，那么这些菜的重量减少了多少千克？
<gadget id="calculator">97 / 100</gadget>
<output>97/100 = around 0.97</output>

<gadget id="calculator">1 - (97/100)</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/100) / (1/20)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1_000 * (3/5)</gadget>
<output>600</output>

<gadget id="calculator">1_000 - 600</gadget>
<output>400</output>

<result>400</result>