Another proposed expansion rule, the cube root rule, calls for the membership of the legislature to be based on the cube root (rounded up) of the U.S. population at the last census. For example, such a rule would call for 676 members of the House based on the 2010 United States Census. An additional House member would be added each time the "national" population "exceeds" the next cube; in this case, the next House member would be added when the census population reached 308,915,777, and the one after that at 310,288,734. A variation would split the representation between the House and the Senate, e.g. 576 members in the House (676 − 100 Senators).