If comint-scroll-show-maximum-output is non-nil, then arrival of output when point is at the end tries to scroll the last line of text to the bottom line of the window, showing as much useful text as possible. (This mimics the scrolling behavior of most terminals.) The default is set to True.

I don’t like chasing the output of shell commands to the bottom of the window.  You can add this to your  .emacs to keep the window from scrolling.

;; Don't scroll to bottom for shell output
(setq comint-scroll-show-maximum-output nil)

Checkout this nifty directive to the format function in Common Lisp.

(format nil "~r" 1606938044258990275541962092)

Which produces this string:

one octillion six hundred six septillion nine hundred thirty-eight sextillion forty-four quintillion two hundred fifty-eight quadrillion nine hundred ninety trillion two hundred seventy-five billion five hundred forty-one million nine hundred sixty-two thousand ninety-two.