It took Uncle Yang 20 minutes to saw a wooden stick into 5 sections, how many minutes would it take to saw it into 10 sections?
杨叔叔把一个木棍锯成5段用了20分钟，如果要锯成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>