Simple calculation: (2013+(2013/2014))/2015.
简便运算：(2013+(2013/2014))/2015．
<gadget id="calculator">2_013 / 2_014</gadget>
<output>2_013/2_014 = around 0.999503</output>

<gadget id="calculator">2_013 + (2_013/2_014)</gadget>
<output>4_056_195/2_014 = around 2_013.999503</output>

<gadget id="calculator">(4_056_195/2_014) / 2_015</gadget>
<output>2_013/2_014 = around 0.999503</output>

<result>2_013/2_014 = around 0.999503</result>