The cost of a small farm tool has been reduced by 20% to 200 yuan. What is the original cost?
一种小农具成本比原来降低了20%，降低到200元，原来成本是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 / (4/5)</gadget>
<output>250</output>

<result>250</result>