(1/13)*(1/13)=how much.
(1/13)*(1/13)=多少．
<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">(1/13) * (1/13)</gadget>
<output>1/169 = around 0.005917</output>

<result>1/169 = around 0.005917</result>