The scrap rate of the parts produced by Master Li is 2%. If 980 of the parts produced are qualified, how many scraps will appear in the parts produced by Master Li?
李师傅生产的零件废品率是2%，要使生产的零件中有980个合格，李师傅生产的零件中会出现多少个废品？
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1 - (1/50)</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">980 / (49/50)</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 * (1/50)</gadget>
<output>20</output>

<result>20</result>