(3/4) square kilometers = how many hectares.
(3/4)平方千米=多少公顷．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 100</gadget>
<output>75</output>

<result>75</result>