Where is the answer to the calculation of 100! on your calculator? It should clearly read: 9.3326215443944152681699238856267e+157
$${\mathtt{100}}{!} = {\mathtt{93\,326\,215\,443\,944\,152\,681\,699\,238\,856\,266\,700\,490\,715\,968\,264\,381\,621\,468\,592\,963\,895\,217\,599\,993\,229\,915\,608\,941\,463\,976\,156\,518\,286\,253\,697\,920\,827\,223\,758\,251\,185\,210\,916\,864\,000\,000\,000\,000\,000\,000\,000\,000}}$$
.$${\mathtt{100}}{!} = {\mathtt{93\,326\,215\,443\,944\,152\,681\,699\,238\,856\,266\,700\,490\,715\,968\,264\,381\,621\,468\,592\,963\,895\,217\,599\,993\,229\,915\,608\,941\,463\,976\,156\,518\,286\,253\,697\,920\,827\,223\,758\,251\,185\,210\,916\,864\,000\,000\,000\,000\,000\,000\,000\,000}}$$