The cart came into the field of Joshua the Beth-shemite, and stood there, where there was a great stone: and they split the wood of the cart, and offered up the cattle for a burnt offering to Yahweh.
Actually it should read, "Of the city, or of the people of fifty thousand, seventy were slain, seventy men were slain." In other words, of that population of the area, approximately fifty thousand people, seventy of them were slain.