The machine tool factory produced 450 machine tools this year. It is known that (3/5) was produced in the first half of the year. How many machine tools will be produced in the second half of the year?
机床厂今年生产450台机床，已知上半年生产了(3/5)，下半年生产多少台机床？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">450 * (2/5)</gadget>
<output>180</output>

<result>180</result>