Yep...I'll give everyone an example using the "metric BMI formula"...:
I'm 1.83 m tall...
My weight is 76 kgs...
1.Now take my length 1.83 and multiply it with itself i.e 1.83x1.83 = 3.3489
2.Now take my weight "76" and divide it by the number I aquired by multiplying my length with itself i.e 76/3.3489 = 22.694019
See...it's not that hard...
