原式=(333+111/112)÷37×56/81=(37×9+37×3/112)÷37×56/81=(9+3/112)×56/81=3×(3+1/112)×56/81=(3+1/112)×56/27=3×56/27+1/112×56/27=56/9+1/(2×56)×56/27=6+2/9+1/54=6+13/54=6又54分之13