There is a 42-meter-long path in a certain park. On one side of the path, there is a stone bench every 7 meters from the beginning to the end. There are 3 potted flowers placed between each two adjacent stone benches. How many potted flowers should be placed in total?
某公园里有一条长42米的小路，小路的一边从头到尾每隔7米有一张石凳，每相邻两张石凳之间摆了3盆花，共要摆多少盆花？
<gadget id="calculator">42 / 7</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>