Now we want to figure out how many columns there are in each row, and the land
is 1900 meters wide. But it looks like depending on where we cut this off, some
of the rows might have different lengths than others. I've done a little math
for you here. This first field in the second row starts 400 meters away from
this edge. Let's give names to these two different kinds of rows. The first and
third are odd rows. The second and fourth and so on would be even rows. How
many columns are in each odd row? How many columns are in each even row?