3.2.1×1.1×0.54÷(5.4×1.21÷5/21 )

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3.2.1×1.1×0.54÷(5.4×1.21÷5/21 )
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3.2.1×1.1×0.54÷(5.4×1.21÷5/21 )
3.2.1×1.1×0.54÷(5.4×1.21÷5/21 )

3.2.1×1.1×0.54÷(5.4×1.21÷5/21 )
2.1×1.1×0.54÷(5.4×1.21÷5/21 )
=2.31×0.54÷(6.534÷5/21 )
=1.2474÷(1.3068/21)
=1.2474÷(0.06223)
=20.04499

2.1*1.1.*54 2.1*1.1.*54 *5
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5.4* 1.21÷(5/21 ) 5.4* 1.21*21
=5/1.1=50/11