Final answer:
To find the total number of butterflies at the site, divide the number on one branch by the factor given, which is 1,000. Therefore, there were approximately 8.912 million butterflies at the site in all.
Step-by-step explanation:
To find the total number of butterflies at the site, we need to divide the number of butterflies on one branch by the factor given. The factor in this case is 1,000. So, we divide 8,912 by 1,000.
8,912 ÷ 1,000 = 8.912
Therefore, there were approximately 8.912 million butterflies at the site in all.