Э... Гхм.... 1/9 от 10-ти см - это уж точно не 1 см Калькулятор использовать не пробовали? Windows/Start/Programs/Accessories/Calculator
10/9=1,1111111111111111111111111111111
You Must Need an Online Calculator to calculate the CM. You can also convert cm into other Units by Using Mycalcu. This is online platform, by using this You can convert cm into inches , Cm to feet, cm to mm, and may more.