Answer:
the answer is 7721.
Explanation:
ok there is a lot of steps but will work them out
6600*.04=264
264+6600=6864
6864*.04=274.56
274.56+6864=7138.56
7138.56*.04=285.5424
285.5424+7138.56=7424.1024
7424.1024*.04=296.964096
296.964096+7424.1024=7721.066496