Later, she asked my wife how many miles she ran. She told Deena each lap was one fourth of a mile. Deena is pretty obsessed with math, and will ask us to quiz her over and over and over. It's not uncommon for us to give her a problem and just let her try to work it out. To be honest, we have done rudimentary fractions before.
My wife informed me she went off by herself, and sure enough, figured it out. Here is her worksheet:
20 is the number of laps she ran. I presume 4 means every 4 laps is 1 mile. 14 with the box around it means the first four laps make the first mile. "58" should be "28". 312 (the 2 is backwards as well), 416, and finally 520. Five boxes, five miles. Nice work kid.