3:7 = 27, 3:9 = 0.5.6, 3:2, (), () according to the regular number of days. 23-9:8 * 8:3 divided by (?) = 14

3/(1/9)=27,4.5/9=0.5,
The last two questions don't understand what you want to ask. If you want to ask, write them in arithmetic form... This should be primary school mathematics. It's not difficult to solve the problem of divisor and dividend. It's easy to calculate as long as the other one is set to X