1-(1/10)-(1/100)-(1/1000).
1-(1/10)-(1/100)-(1/1000)．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">1 - (1/10) - (1/100) - (1/1_000)</gadget>
<output>889/1_000 = around 0.889</output>

<result>889/1_000 = around 0.889</result>