Master Zhang makes a batch of parts. The 150 parts that have been made account for (2/5) of the total number of parts. How many parts have not yet been made?
张师傅制作一批零件，已经制作的150个零件占零件总数的(2/5)，还没制作的零件数是多少？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">150 / (2/5)</gadget>
<output>375</output>

<gadget id="calculator">375 - 150</gadget>
<output>225</output>

<result>225</result>