<DIV>The calculus called arrow-multiply is defined as :</DIV>
<DIV>m!n := m*m*...*m (there are n integer to multiply )<BR>m!!n := m!m!...!m (there are n integer to multiply )</DIV>
<DIV>m!!!n := m!!m!!...!!m (there are n integer to multiply )<BR></DIV>
<DIV><BR>--<BR>
<DIV> ying yun zang</DIV></DIV><BR><PRE> </PRE>