Simple calculation: ((17/99)+(1717/9999))/(171717/979797).
简便计算：((17/99)+(1717/9999))/(171717/979797)．
<gadget id="calculator">17 / 99</gadget>
<output>17/99 = around 0.171717</output>

<gadget id="calculator">1_717 / 9_999</gadget>
<output>17/99 = around 0.171717</output>

<gadget id="calculator">(17/99) + (17/99)</gadget>
<output>34/99 = around 0.343434</output>

<gadget id="calculator">171_717 / 979_797</gadget>
<output>17/97 = around 0.175258</output>

<gadget id="calculator">(34/99) / (17/97)</gadget>
<output>194/99 = around 1.959596</output>

<result>194/99 = around 1.959596</result>