3/7乘上3/13再乘上七乘上43,我们在进行自己算的过程中进行约分和化简就等于9/13乘上43
3/7*3/13*7*43=3/7*7*3/13*43=3*3/13*43=9/13*43=387/13
可以这样算。3/7x3/13x7x43=3/7x7x3/13x43=3x3/13x43=9/13x43=387/13
3/7x3/13x7x43=3/7x7x3/13x43=3x43x3/13=387/13