There are a total of 45 telegraph poles (both ends) between Zhangcun and Licun, and the distance between every two telegraph poles is 20 meters. How many meters is the distance between Zhangcun and Licun?
张村到李村之间一共有45根电线杆(两端都有)，每两根电线杆之间相距20米，张村和李村相距多少米？
<gadget id="calculator">45 - 1</gadget>
<output>44</output>

<gadget id="calculator">20 * 44</gadget>
<output>880</output>

<result>880</result>