Calculation: 0.3+0.{_{3}**(•)}=how much (the result is written as a fraction).
计算：0.3+0.{_{3}**(•)}=多少(结果写成分数)．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/10) + (1/3)</gadget>
<output>19/30 = around 0.633333</output>

<result>19/30 = around 0.633333</result>