Plant a tree every 6 meters, and plant 100 trees in rows. How many meters are there from the first tree to the 100th tree?
每6米栽一棵树，要栽100棵，栽成行．从第一棵到第100棵树共有多少米．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">99 * 6</gadget>
<output>594</output>

<result>594</result>