A corridor is 24m long, and a pot is placed every 3m (both ends must be placed), how many pots should be placed in total.
一条走廊长24m，每隔3m放一盆(两端都要放)，一共要放多少盆．
<gadget id="calculator">24 / 3</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>