A basket of tomatoes weighs 40kg, which is 20% less than a basket of potatoes. How many kg does a basket of potatoes weigh?
一筐西红柿由40kg，比一筐土豆少20%，一筐土豆有多少kg．
<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">40 / (4/5)</gadget>
<output>50</output>

<result>50</result>