Master Li processed a batch of parts, and the unqualified parts were qualified parts (1/19). Later, he carefully selected and found 2 unqualified products from the qualified products. At this time, the qualified rate of the products was 94%. How many qualified products are there?
李师傅加工一批零件，不合格零件是合格零件的(1/19)，后来又仔细挑选，从合格产品中发现2个不合格，这时产品合格率是94%．合格产品共有多少个？
<gadget id="calculator">94 / 100</gadget>
<output>47/50 = around 0.94</output>

<gadget id="calculator">1 + 19</gadget>
<output>20</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (47/50) - (1/20)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">2 / (1/100)</gadget>
<output>200</output>

<gadget id="calculator">200 * (47/50)</gadget>
<output>188</output>

<result>188</result>