40 small flags are inserted on both sides of the welcome road (both ends), and the distance between two adjacent small flags is 5 meters. How many meters is this welcome road?
40面小旗插在迎宾道路的两旁(两端都插)，每相邻两面小旗的距离是5米．这条迎宾道长多少米．
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">19 * 5</gadget>
<output>95</output>

<result>95</result>