A highway is 2,000 meters long, and 1,800 meters have been repaired. What percentage is left unfinished?
一条公路全长2000米，已修好了1800米，还剩下百分之几没有修好？
<gadget id="calculator">2_000 - 1_800</gadget>
<output>200</output>

<gadget id="calculator">200 / 2_000</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>