There is a row of trees planted on the side of the road, and the distance between every two trees is 5 meters. Xiao Gang ran from the first tree to the 100th tree, how many meters did he run in total?
路边种着一排树，每两棵树之间相距5米，小刚从第1棵跑到第100棵，一共跑了多少米．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">5 * 99</gadget>
<output>495</output>

<result>495</result>