For a batch of parts, there are 1970 qualified products and 30 rejected products. What is the qualified rate of the products?
一批零件，合格产品有1970个，废品有30个，产品的合格率是多少．
<gadget id="calculator">1_970 + 30</gadget>
<output>2_000</output>

<gadget id="calculator">1_970 / 2_000</gadget>
<output>197/200 = around 0.985</output>

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

<gadget id="calculator">(197/200) * 1</gadget>
<output>197/200 = around 0.985</output>

<result>197/200 = around 0.985</result>