If it takes 10 minutes to saw a piece of wood into 5 pieces, how many minutes will it take to saw it into 10 pieces?
一根木头锯成5段要10分钟，锯成10段要多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">(5/2) * 9</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>