It takes (3/20) meters of steel to make a part. Use a section of steel with a length of 1 meter to make 5 such parts. How many meters are left for this section of steel?
做一个零件需钢材(3/20)米，用一段长1米的钢材做5个这样的零件，这段钢材还剩多少米？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/20) * 5</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

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