Hey Guys
I appreciate if someone guide me
I want to add LP and farm it . for example if i choose add farm on bnb-cake pair . When i add LP i have to add $100 of bnb and $100 of cake to farm . so farm calculate $100 for interest or $200

I will suggest you an article about that and then you can try to read the whole explanation about pancake farm
https://medium.com/stakingbits/yield-farming-with-pancakeswap-fe3e64b1874eIf you're putting $100 bnb and $100 cake, the total will be $200. It's clearly stated by article. It doesn't matter how much you wanna stake or farm your coins and it will always be divided into the 50% : 50% ratio