The grid reference of a point located 3 tenths of the way across grid square 47 eastward and 7 tenths of the way up grid square 23 northward is

A six-figure grid reference is read as easting then northing. The easting is the grid line 47 plus 3 tenths, giving 473. The northing is the grid line 23 plus 7 tenths, giving 237. The full reference is therefore 473237. Distractors represent common errors in reading or recording the tenths digit.