It takes Xiao Wang 20 minutes to saw a piece of wood into 5 sections, how many minutes will it take to saw it into 10 sections now?
小王把一根木头锯成5段需要20分钟，现在要把它锯成10段，需要多少分钟．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>