The problem statement= what they want you to find. Here it will be F
All variables and given data= you have your equation, F=force, M=mass and a=acceleration. Your known data is the numbers they give you. Make sure that 10 is in units of kilogram.
Relevant equation= F=MA
Solution= You know mass and acceleration, so the equation tells you that if you multiply them, you'll have your force. mass should be in units of kilogram and acceleration should be in meters per second squared which will leave you with newtons which is a unit of force.