如何使用XPath从网页中抓取值

Question

library(rvest)
url <- "https://www.immobilienscout24.de/expose/120960754"
url %>%
    read_html() %>%
    html_nodes(xpath='//*[@id="is24-content"]/div[2]/div[1]/div[4]/div[4]/div[2]/div/div/div/div[1]/div[3]/div/div[5]/div/div/span')%>%
    html_text() 

完整的Xpath

/html/body/div[2]/div[4]/div[1]/div/div[3]/div[2]/div[1]/div[4]/div[4]/div[2]/div/div/div/div[1]/div[3]/div/div[5]/div/div/span

我需要取消的价值在这里：

<span class="additional-costs-value font-ms font-semibold">13.810&nbsp;€</span>