Cant figure out the following program. Have to submit it as part of project on Monday! ! ! Please Help

You’ve been given an assorted set of gears. Each gear has a different number of teeth – the notches on a gear that interlock with notches on another gear to transmit speed. You have a couple of belts one coupled to an input and the other for the output. You are given the rpm of the input belt Si and a minimum value So (where So > Si) so that you can increase the speed via a system of gears as shown above
You need to figure out all the possible pairs of gears that can be used to achieve an output rpm >= So.
Input
The input is specified in a file containing test-cases.
• The first line contains the number of gears that are available to you, g.
• The next line contains g numbers indicating the number of teeth on each gear, separated by spaces.
• The next line contains the number of test cases – n
o This is followed by n test cases. Each test case is specified by 2 speed values on a single line. (So here the first test case specifies that you need to design a gear-system that increases Si = 50 rpm to a value above 200 rpm)
7
20 10 4 6 40 25 100
2
50 200
35 75

Output
9
15

E.g. for raising the speed from 50 to 200, any of the following 9 pairs can be used
[100, 6] [40, 6] [25, 6] [25, 4] [20, 4] [40, 4] [100, 4] [100, 20] [100, 10]

Be aware that JavaRanch is NotACodeMill. While we're happy to help people, we like for them to ShowSomeEffort. So: What do you have so far? If you haven't started yet, what ideas have you had?