A tree is planted every 4 meters on the side of an avenue, and a total of 224 trees are planted from the beginning to the end. How long is this avenue in meters?
在一条大道的一旁每隔4米栽一棵树，从起点到终点一共栽了224棵，这条大道长多少米？
<gadget id="calculator">224 - 1</gadget>
<output>223</output>

<gadget id="calculator">223 * 4</gadget>
<output>892</output>

<result>892</result>