Stop using AI as a calculator.

One of the most common mistakes people make with AI is asking it to do the calculation directly.

One of my learners works in finance. She told me Claude always gets her numbers wrong, so she double-checks every one by hand. Which defeats the whole point of asking AI to do it in the first place.

She is not alone. Finance people running numbers in ChatGPT. Marketers asking it to total up a campaign report. The answer comes back confident, and the math is off.

So why can’t AI calculate accurately out of the box?

Because an LLM is a probabilistic machine. It predicts the next token based on everything it has seen. When you ask it “what is 18,450 x 7.2”, it is not actually multiplying. It is guessing the most likely answer based on patterns in its training data.

Most of the time it lands close on a simple sum. But throw many records at it and ask it to produce a managerial finance report or a marketing report, and you should be ready for guesstimates.

The fix is simple. Don’t ask AI to do the calculation. Ask it to write a script to do the calculation.

A script runs the actual math, step by step.

Remember this. If you are not explicit, it comes down to luck. Sometimes the model decides on its own to write and run a script. Sometimes it just guesstimates and hands you a number.

So make it explicit: “write a script to calculate this and run it.”

If you work with numbers in finance, reporting, or analytics, stop treating AI as the calculator. Treat it as the thing that writes the calculator for you.

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If you are a business professional who wants to learn the foundation of using AI the right way, I run a Foundations of Claude Code workshop. The next two cohorts are on 2 July and 16 July.

Details: https://lnkd.in/e9r8kScw

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