Sir I have been working on this type of problem for one day and have keep trying to do more problems and could not understand why my calculations decimal places wasn't adding up. I have watched countless videos on this type of problem and it wasn't making sense until I watched your video. I was multiplying everything including the x 10 to the 23 in the problem instead of just putting in my calculator #EE and the exponent and then multiply by the other number the same way. Then I couldn't understand that conversion from kg to grams by multiplying by 1000 until you explained it. Thank you soooo much. Omg just thank you.