306! = 239173996384638911621371865259011909619520929615990734004971226736821915684725239804936265011865680107741138308851702264217991891965116582835828443886740763501531720147636287355793266770557226193937935583774530578598321466801621424385260469978477227115289436701562810814734657830495283977875079403770082705324858544451357617212960681791904007720707186724989400117118969197128867064915343315120500382951969559449042127123060694118606983293115581689620318745092292717291609513200422633751854076963549643051034401121509252871521668538263318246667987852460032000000000000000000000000000000000000000000000000000000000000000000000000000
* 630 桁