(除以)原试=7/2+56/12×24/11-34/29÷29/12
=7/2+112/11-408/841
=301/22-408/841
=244165/18502
=13.19668143984434115230785860988
除原试=7/2+56/12×24/11-34/29÷12/29
=7/2+112/11-17/6
=358/33
=10.848484848484848484848484848485