Uncle Zhang’s family collected 500 kilograms of fresh lychees this year, with a water content of 85%. After drying for a week, the water content was 40%. What is the mass of these lychees in kilograms at this time?
张大伯家今年收鲜荔枝500千克，含水量为85%，晒了一个星期后，含水量为40%．这时这些荔枝的质量是多少千克？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">40 / 100</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">(3/20) / (3/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">500 * (1/4)</gadget>
<output>125</output>

<result>125</result>