There are currently 4,500 species of dragonflies, accounting for 0.45% of insect species. How many species of insects are there?
蜻蜒目前有4500种，占昆虫种类的0.45%，昆虫有多少种．
<gadget id="calculator">0.45 / 100</gadget>
<output>0.0045</output>

<gadget id="calculator">4_500 / 0.0045</gadget>
<output>1_000_000</output>

<result>1_000_000</result>