(-1/63)÷(1/9-2/7+2/3-1/14) 要简便方法急求!

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(-1/63)÷(1/9-2/7+2/3-1/14) 要简便方法急求!

(-1/63)÷(1/9-2/7+2/3-1/14) 要简便方法急求!
(-1/63)÷(1/9-2/7+2/3-1/14) 要简便方法急求!

(-1/63)÷(1/9-2/7+2/3-1/14) 要简便方法急求!
(-1/63)÷(1/9-2/7+2/3-1/14)
=(-1/63)/(7/9-5/14)
=(-1/63)/(98-45)/126
=(-1/63)*126/54
=-1/27