One side of a vegetable field is 800 meters long. To build a fence along this side, 41 wooden poles need to be planted equidistantly from the beginning to the end. How many meters are there between each two poles?
有一块菜地的一边长是800米，要沿着这条边做一道栅栏，需从头到尾等距离地栽41根木杆．每两根木杆之间相距多少米．
<gadget id="calculator">41 - 1</gadget>
<output>40</output>

<gadget id="calculator">800 / 40</gadget>
<output>20</output>

<result>20</result>