(81.4+1/6+1/4+1/5)÷(1/4+1/5+1/6)
=81.4÷(1/4+1/5+1/6)+(1/6+1/4+1/5)÷(1/4+1/5+1/6)
=81.4÷37/60+1
=81.4×60/37+1
=132+1
=133