What is the number composed of 5 (1/10) and 2 (1/1000)?
5个(1/10)和2个(1/1000)组成的数是多少．
<gadget id="calculator">2 / 1_000</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">0.5 + (1/500)</gadget>
<output>0.502</output>

<result>0.502</result>