A street light pole is buried every 50 meters on both sides of the road, including the street light poles buried at both ends of this section of the road, a total of 10 are set up, how many meters is this section of road long?
在公路两边每隔50米埋设一根路灯杆，包括这段路两端埋设的路灯杆，共设了10根，这段路长多少米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 50</gadget>
<output>200</output>

<result>200</result>