((2000*2001-2000)/(1995+1995*1994))*((1995*1995)/(1000*1001-1000)).
((2000*2001-2000)/(1995+1995*1994))*((1995*1995)/(1000*1001-1000))．
<gadget id="calculator">2_000 * 2_001</gadget>
<output>4_002_000</output>

<gadget id="calculator">4_002_000 - 2_000</gadget>
<output>4_000_000</output>

<gadget id="calculator">1_995 * 1_994</gadget>
<output>3_978_030</output>

<gadget id="calculator">1_995 + 3_978_030</gadget>
<output>3_980_025</output>

<gadget id="calculator">4_000_000 / 3_980_025</gadget>
<output>160_000/159_201 = around 1.005019</output>

<gadget id="calculator">1_995 * 1_995</gadget>
<output>3_980_025</output>

<gadget id="calculator">1_000 * 1_001</gadget>
<output>1_001_000</output>

<gadget id="calculator">1_001_000 - 1_000</gadget>
<output>1_000_000</output>

<gadget id="calculator">3_980_025 / 1_000_000</gadget>
<output>159_201/40_000 = around 3.980025</output>

<gadget id="calculator">(160_000/159_201) * (159_201/40_000)</gadget>
<output>4</output>

<result>4</result>