(3.91+3又3/7+6.09+3又4/7）x（2又1/8-1.125)+(1除以2/3-1.5）x6.04
=(3.91+6.09+3又3/7+3又4/7）x（1+1又1/8-1.125)+(3/2-1.5）x6.04
=17