1/4*(4.85÷八分之五-3.6 6.15*三又五分之三)

1/4*(4.85÷八分之五-3.6 6.15*三又五分之三)
=1/4*(4.85×8/5-3.6 6.15×18/5)
=1/4*(7.76-3.6 22.14)
=1/4*26.3
=6.575

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