Is the whole MATH training set corresponds to around 7 steps?

[HCHCXY]

I notice that rollout_batch_size is set to 1024, and the total prompt num is around 7500. Does that mean the whole MATH training set affords only 7 rollouts? That's very offline

[HCHCXY]

Also, I'm curious about if a rollout corresponds to a training step in the fig you post

[tmfs10]

It's 20 episodes of training -- so 140 rollouts