On the side of a road, 25 trees are planted, and one tree is planted every 4 meters. How many meters are there from the first tree to the 25th tree?
在一条路的一旁，栽了25棵树，每4米栽一棵，从第一棵到第25棵共有多少米．
<gadget id="calculator">25 - 1</gadget>
<output>24</output>

<gadget id="calculator">24 * 4</gadget>
<output>96</output>

<result>96</result>