A road has a telephone pole every 5 meters, and there are 20 poles at both ends. Do the math, how long is this road?
一条路每隔5米有电线杆一根，连两端共有20根，算一算，这条路有多长？
<gadget id="calculator">20 - 1</gadget>
<output>19</output>

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

<result>95</result>