分数除法:
4/9÷5/6=8/15
7/10÷4/5=7/8
14/15÷2/3=7/5
3/8÷3/4=1/2
7/8÷3/4=7/6
4/7÷3/14=8/3
4/5÷1/2=8/5
6/7÷1/3=18/7
5/12÷5/11=11/12
3/7÷5/14=6/5