It takes 40 seconds to saw a piece of wood into 5 sections. How many seconds will it take to saw the same piece of wood into 10 sections?
一根木头锯成5段需要40秒，照这样把一根同样的木头锯成10段，需要多少秒
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

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

<gadget id="calculator">9 * 10</gadget>
<output>90</output>

<result>90</result>