This world is full of amazing things, the ups and downs. The point is not to let go when down because you might not know whether you have reached the rock bottom. Therefore, you might end up slipping a little bit further down. The farther you go down the more difficult and energy required to go up.
In any society we find people coming from all walks of life. Sample any group of people and ask them whether mathematics is one of their favourite subjects. You will be surprised about the mixed responses you will receive. The average literacy levels of ordinary Zimbabwean population is quite high but do you need to subject the citizens to such computations in budgetary planning. Let alone if a couple is going on romantic shopping, such high level computations may take out a bit of fun when making purchases. Hopefully, this past and one of event will never be repeated in Zimbabwe.