A pile of radishes contains 95% water. After several days in the sun, the water content is 90%. At this time, the radish weighs 50kg. What is the original weight of the radish?
一堆萝卜，含水95%，晒若干天后，含水90%，这时萝卜重50kg，萝卜原重多少千克．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</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">(1/10) / (1/20)</gadget>
<output>2</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<result>100</result>