Chengguan Primary School planted 28 trees from the beginning to the end on one side of a road, and planted one tree every 6 meters. How many meters is this road?
城关小学在一条大路的一边从头至尾栽树28棵，每隔6米栽一棵，这条路长多少米．
<gadget id="calculator">28 - 1</gadget>
<output>27</output>

<gadget id="calculator">27 * 6</gadget>
<output>162</output>

<result>162</result>