For a regular hexagonal flower bed, if there are 4 pots of flowers on each side, then at least how many pots should be placed.
一个正六边形花坛，如果每条边摆4盆花，那么至少要摆多少盆．
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">24 - 6</gadget>
<output>18</output>

<result>18</result>