Let's assume that when the amToken pool was created on Mai Finance, there was 1,000 amTokens and you deposited 100 of them. Because the pool is just created, the ratio between amTokens and camTokens is 1:1, and you own 10% of the pool. After one year, assuming nobody added any more amTokens nor removed anything, the pool generated 4.93% interest, and now there are 1049.3 amTokens in the pool. However, you still only own 10% of the pool, represented by your 100 camTokens. The ratio is now 1:1.0493, which means that 1 camToken now worth 1.0493 amToken.