1-(1/2)-(1/20)-(1/200)-(1/2000).
1-(1/2)-(1/20)-(1/200)-(1/2000)．
<gadget id="calculator">2_000 / 2_000</gadget>
<output>1</output>

<gadget id="calculator">1_000 / 2_000</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / 2_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">1 - (1/2) - (1/200) - (1/2_000)</gadget>
<output>989/2_000 = around 0.4945</output>

<result>989/2_000 = around 0.4945</result>