It is planned to make a batch of parts, A has made 25% of the total, B has made 30% of the total, and there are 162 left unmade, how many parts are there in this batch?
计划做一批零件，甲做了总数的25%，乙做了总数的30%，还剩下162个没有做，这批零件有多少个？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">162 / (9/20)</gadget>
<output>360</output>

<result>360</result>