Calculate (2001+2000*2002)/(2001*2002-1)=how much.
计算(2001+2000*2002)/(2001*2002-1)=多少．
<gadget id="calculator">2_001 * 2_000</gadget>
<output>4_002_000</output>

<gadget id="calculator">2_001 + 4_002_000 + 2_000</gadget>
<output>4_006_001</output>

<gadget id="calculator">2_001 * 2</gadget>
<output>4_002</output>

<gadget id="calculator">4_002 - 1</gadget>
<output>4_001</output>

<gadget id="calculator">4_002_000 + 4_001</gadget>
<output>4_006_001</output>

<gadget id="calculator">4_006_001 / 4_006_001</gadget>
<output>1</output>

<result>1</result>