I need help creating a math equation.

"It will take me x energy to do one pushup at x gravity if I am x strong."

Where gravity and strength are supplied and energy needs to be figured.

It needs to work atleast for gravity 1-1000 and strength 1-1000000000, all combinations.

I know I'm pretty much asking for someone to create this for me, and great thanks to anyone that does. I've been experimenting for 4 hours now and can't even seem to get close.