6.3×【(1.4+1/3)÷1.12-1又1/6]
=6.3×【(7/5+1/3)÷28/25-7/6]
=6.3×【26/15×25/28-7/6]
=6.3×【65/42-49/42]
=6.3×8/21
=2.4