The machine tool factory originally had 108 special-purpose machine tools and 60 ordinary machine tools. If you want to adjust the number of special-purpose machine tools to 5 times that of ordinary machine tools, how many ordinary machine tools should be changed into special-purpose machine tools?
机床厂原有专用机床108台，普通机床60台．如果想把专用机床数调整到普通机床的5倍，那么应该将多少台普通机床改为专用机床？
<gadget id="calculator">5 * 60</gadget>
<output>300</output>

<gadget id="calculator">300 - 108</gadget>
<output>192</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">192 / 6</gadget>
<output>32</output>

<result>32</result>