1 sqr ft= 0.11111 sqr yards
STEP 1:
Find the area in square feet
A= l*w
A= 210 ft * 300 ft
A= 63,000 square feet
STEP 2:
Find number of square yards
= 63,000 * 0.11111 sqr yards
= 6,999.93 sqr yards
STEP 3:
Multiply number of birds per sqr yard by number of sqr yards
= 6,999.93 * 2
= 13,999.86 birds
ANSWER: There are 13,999.86 (or rounded to 14,000) birds in the field.
Hope this helps! :)