The uncle of the worker wants to saw a 10m long steel pipe into small sections of the same length, sawing it 4 times in total, and the length of each section is the length of the steel pipe.
工人叔叔要把一根10m长的钢管锯成同样长的小段，共锯了4次，每段的长是这根钢管的多少．
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

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

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