4/7*4/93+16*1/7+1/7*4/13
=(4/7)*(4/93+4+1/13)
=(4/7)*(4+4/93+1/13)
=(4/7)*(4+145/1209)
=16/7+5851/8463
=25195/8463
=2又8269/8463
4/7*4/93+16*1/7+1/7*4/13
=(4/7)*(4/93+4+1/13)
=(4/7)*(4+4/93+1/13)
=(4/7)*(4+145/1209)
=16/7+5851/8463
=25195/8463
=2又8269/8463