Saw a 3-meter-long steel bar into small sections of the same length, and saw 4 times in total, what is the total length of each section
把3米长的钢筋锯成每段一样长的小段，共锯4次，则每段是全长的多少
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>