maritz will be spending her vacation at her uncle's house in the mountains. she drove the 582 kilometers from her home to her uncle's house in 6 hours. at what rate did mariluz complete her trip

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?