To place flower pots on the edge of a hexagonal pool so that there are 5 potted flowers on each side, how many potted flowers are needed at least.
要在六边形的水池边上摆花盆，使每一边都有5盆花，最少需要多少盆花．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 - 6</gadget>
<output>24</output>

<result>24</result>