Calculate with a simple method: {_{0. }**{}}{_{3}**(•)}{_{5}**(•)}+{_{0． }**{}}{_{7}**(•)}{_{2}**{}}{_{3}**(•)}+{_{0． }**{}}{_{3}**(•)}{_{1}**(•)}+{_{0． }**{}}{_{3}**(•)}{_{9}**{}}{_{0}**(•)}.
用简便方法计算：{_{0．}**{}}{_{3}**(•)}{_{5}**(•)}+{_{0．}**{}}{_{7}**(•)}{_{2}**{}}{_{3}**(•)}+{_{0．}**{}}{_{3}**(•)}{_{1}**(•)}+{_{0．}**{}}{_{3}**(•)}{_{9}**{}}{_{0}**(•)}．
<gadget id="calculator">35 / 99</gadget>
<output>35/99 = around 0.353535</output>

<gadget id="calculator">723 / 999</gadget>
<output>241/333 = around 0.723724</output>

<gadget id="calculator">31 / 99</gadget>
<output>31/99 = around 0.313131</output>

<gadget id="calculator">390 / 999</gadget>
<output>130/333 = around 0.39039</output>

<gadget id="calculator">(35/99) + (241/333) + (31/99) + (130/333)</gadget>
<output>593/333 = around 1.780781</output>

<result>593/333 = around 1.780781</result>