Walk through [this problem]
one step at a time, pausing
to ask what I think comes
next. Keep every unit visible
so I can see where they
cancel.

Stoichiometry, One Careful Pass

Units kept visible the whole way, so cancellation is obvious.

Prompt

Walk me through this stoichiometry problem — [paste it] — one step at a time, pausing after each to ask what I think comes next. Keep every unit visible in the working so I can see where they cancel.