There are 483 qualified parts in a batch of parts in a factory, and the unqualified parts account for 30% of the total. How many parts are unqualified in this batch?
一个工厂一批零件，有483个合格，不合格的零件占总数的30%，这批零件有多少个不合格？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">483 / (7/10)</gadget>
<output>690</output>

<gadget id="calculator">690 - 483</gadget>
<output>207</output>

<result>207</result>