There is a road with poplars planted every 5 meters on the left side and willows planted every 6 meters on the right side. Trees are planted at both ends. There are 5 places where poplars and willows face each other. How many meters is this road?
有一条道路，左边每隔5米种一棵杨树，右边每隔6米种一棵柳树，两端都种上树，共有5处是杨树与柳树相对．这条道路长多少米？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>