The context of the following conversation is Bailey has been trying to solve a problem for a while now but has been stumped. He finally figured it out after a final check.:
Bailey says Ah that was the problem.
The friend responds You figured it out.
Bailey responds yes, I had the decimal in the wrong place.
The friend responds Oh yes,  I've done that before.
Bailey responds this time the formula should work perfectly.
The friend responds great, well done, that was a difficult one.