10 people stand in a column, a total of 18 meters, what is the distance between each two?
10人站成一纵队，共18米，每两人之间距离多少米？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<result>2</result>