The qualification rate of a certain batch of products is 90%, so among the 20 products taken out, how many products may be qualified at most?
某一批产品的合格率为90%，那么在取出的其中20件产品中，最多可能有几件产品合格？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">20 * (9/10)</gadget>
<output>18</output>

<result>18</result>