(12/13)*(91/144)=how much.
(12/13)*(91/144)=多少．
<gadget id="calculator">12 / 13</gadget>
<output>12/13 = around 0.923077</output>

<gadget id="calculator">91 / 144</gadget>
<output>91/144 = around 0.631944</output>

<gadget id="calculator">(12/13) * (91/144)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>