(19/17)*(1717/1919)=how much.
(19/17)*(1717/1919)=多少．
<gadget id="calculator">19 / 17</gadget>
<output>19/17 = around 1.117647</output>

<gadget id="calculator">1_717 / 1_919</gadget>
<output>17/19 = around 0.894737</output>

<gadget id="calculator">(19/17) * (17/19)</gadget>
<output>1</output>

<result>1</result>