10 rabbits line up to do exercises, every two rabbits are 2 meters apart, how many meters is the rabbit team?
10只兔子排队做操，每两只兔子隔2米，兔子队伍多少米？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

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

<result>18</result>