((1994*1995-1)/(1994+1993*1995))=how much.
((1994*1995-1)/(1994+1993*1995))=多少．
<gadget id="calculator">1_994 * 1_995</gadget>
<output>3_978_030</output>

<gadget id="calculator">3_978_030 - 1</gadget>
<output>3_978_029</output>

<gadget id="calculator">1_993 * 1_995</gadget>
<output>3_976_035</output>

<gadget id="calculator">1_994 + 3_976_035</gadget>
<output>3_978_029</output>

<gadget id="calculator">3_978_029 / 3_978_029</gadget>
<output>1</output>

<result>1</result>