In her lifeguarding class, Summer swam a loop from Point A to Point B, then to Point C and then diagonally
back to Point A. Each unit on the graph represents
10 meters. If Summer swam the loop 3 times, how
many total meters did she swim?

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?