A tree is planted every 10 meters on one side of the road, and both ends are planted. A total of 65 trees are planted. How long is this road in total?
马路的一边每隔10米栽一棵树，两头都栽，共栽了65棵树，这段马路一共有多长？
<gadget id="calculator">65 - 1</gadget>
<output>64</output>

<gadget id="calculator">10 * 64</gadget>
<output>640</output>

<result>640</result>