The cafeteria shipped 30kg of cabbage, which was 1/5 more than the potatoes. How many kilograms of potatoes did the school bring?
食堂运来30千克白菜，比运来的土豆多(1/5)，学校运来土豆多少千克．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">30 / (6/5)</gadget>
<output>25</output>

<result>25</result>