A certain manager produces a batch of parts, the pass rate is 98%, and 2 parts are waste products. How many parts are there in this batch?
某长生产一批零件，合格率98%，有2个零件是废品，这批零件有多少个．
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">1 - (49/50)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">2 / (1/50)</gadget>
<output>100</output>

<result>100</result>