206! = 55999397401181624007970525662228881095168659729947683663459568612877337687103244532741481446193158669223111681827099783995223685855991394533857968704451505138207572405603545223305877760386469231760852842439470446554717967072798418218925958492128260636540143129576946167209039675309828823599001441864639500011288693462578636098658615322214400000000000000000000000000000000000000000000000000
* 389 桁