<ul data-eligibleForWebStory="true">A blog post written four years ago discussed using simple solutions like division and multiplication for client problems.The author recalled a conversation with a friend where division was highlighted as a key recommendation.During a recent deposition, the author had to explain using a ratio to arrive at a number in a report.It was mentioned that sometimes more complex solutions are needed despite the actual solution being simple.In another instance, the author was asked to calculate car momentum using mass and velocity, which involved multiplication.The author declined the car momentum project suspecting there was more complexity to the problem.Real-world problems can be more intricate despite seemingly simple solutions at times.Complicated solutions may be needed, such as cepstrum analysis, or simple arithmetic may suffice.The post reflects on different scenarios where arithmetic plays a role in problem-solving.Sometimes the journey to a solution is complex, or the nature of the problem itself is inherently complicated.The key takeaway is that arithmetic, whether simple or complex, can be a valuable tool in addressing various challenges.This post on 'Arithmetic for fun and profit' was originally published on John D. Cook's blog.