Math is a wonderful thing:
Substitute X for (2+1) and Y as the unknown
6/2X=Y
Remove 2X from the left side by multiplying both sides by 2X
6= 2XY
Divide both sides by 2
3=XY
Replace 2+1 for X
3=(2+1)*Y
Solve for Parenthesis
3=3Y
Divide both sides by 3
1=Y

Next talk about lies, damn lies and statistics.