In the equation on the board B is equal to 3977
A man points at a formula on a whiteboard that reads RNTC=RNTC and Vmiddle=Vb, plus others.
Someone is working on an equation about Vmiddle and Vb.
A man pointing at a white board which contains the letters RNTC.
A man at a smart screen pointing to a formula containing B=3277.