8/13÷9/10×4/10÷（5/9÷11/2×4/13）
=8/13×4/9×9/5×11/2×13/4
=8/13×4/5×13/4×11/2
=8/5×11/2
=8.813分之8除以10分之9乘以10分之4的积 除以9分之5除以2分之11乘13分之4的积【8/13÷（9/10×4/10）】÷【5/9÷（11/2×4/13）】=【8/13÷9/25】÷【5/9÷22/13】=8/13×25/9×9/5×22/13=8/13×22/13×（25/9×9/5）=176/169×5=880/169（8/13÷9/10×4/10）÷（5/9÷11/2×4/13）（8/13÷9/10×4/10）÷（5/9÷11/2×4/13）=8/13×4/9×9/5×11/2×13/4=8/13×4/5×13/4×11/2=8/5×11/2=8.8最后答案是八又五分之四8.8=八又五分之四