How many times does it take to cut an 18-meter-long log into sections every 3 meters?
把一根18米长的木头每3米截成一段，最多需截多少次．
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>