A machine tool factory produced 1,600 machine tools in the year before last, and 2,000 machine tools last year. What is the increase in production last year compared with the year before?
某机床厂前年生产机床1600台，去年生产机床2000台，去年比前年增产多少．
<gadget id="calculator">2_000 - 1_600</gadget>
<output>400</output>

<gadget id="calculator">400 / 1_600</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>