It takes 60 seconds to saw a piece of wood with a length of 25 meters into small sections of every 5 meters. How long does it take to saw a piece of wood with a length of 50 meters into small sections of every 5 meters?
将一根长25米的木头锯成每5米一段的小段，共用时60秒，现要将一根长50米的木头锯成每5米一段的小段，需要多少时间？
<gadget id="calculator">25 / 5</gadget>
<output>5</output>

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

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">50 / 5</gadget>
<output>10</output>

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

<gadget id="calculator">15 * 9</gadget>
<output>135</output>

<result>135</result>