=4 1 and 1/2×(3 1 and 1/3- 1 and1/3× 2)-9.5×1/kloc.
=4 1 and 1/2×8 and 2/3-9.5× 1 1 and 1/3.
=4 1 and 1/2×8 and 2/3-9.5×8 and 2/3-9.5×2 and 2/3.
=(4 1.5-9.5)×8 and 2/3-9.5×8/3.
=32×8 2/3-76/3
=32×(9- 1/3)-76/3
=288-(32/3+76/3)
=288-36
=252
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