Calculation: 0.{_{3}**(•)}-0.0{_{3}**(•)}-0.00{_{3}**(•)}=how much (the result is written in fraction form)
计算：0.{_{3}**(•)}-0.0{_{3}**(•)}-0.00{_{3}**(•)}=多少(结果写成分数形式)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 300</gadget>
<output>1/300 = around 0.003333</output>

<gadget id="calculator">(1/3) - (1/30) - (1/300)</gadget>
<output>89/300 = around 0.296667</output>

<result>89/300 = around 0.296667</result>