In the formula (1/(taste))+(1/(taste))+(1/(number))+(1/(study))=1, "fun", "taste", "number", "study "Represents four different natural numbers, when "learning"=18, interest+taste+number=how much.
在算式(1/(趣))+(1/(味))+(1/(数))+(1/(学))=1，"趣"、"味"、"数"、"学"表示不同的四个自然数，当"学"=18时，趣+味+数=多少．
<gadget id="calculator">9 + 3 + 2</gadget>
<output>14</output>

<result>14</result>