Idea about ABC Method

I did this video to give an idea about what is ABC Method. In the example when I Doing 4th step : I typed 7000 x 20 as 14000. It is a mistake and it should be 140 000 and final answer of that step should be 14, not 1.4. Sorry for confusing. This explanation I learned from Hashan Waduge sir. Special Thanks sir for giving permission to do this.