A reliable way to check multi-step math is to estimate the answer first, write one operation per line, keep units beside every value, and verify the result with the inverse operation. This catches common mistakes such as misplaced decimals, missing negative signs, and rounding too early. For an independent step-by-step explanation, Math AI accepts typed equations, word problems, and uploaded problem photos: https://mathai.chat/ Compare the explanation with your own work and locate the first step where the two methods differ; that is usually more useful for learning than copying only the final answer.