13131313/37373737
13131313/37373737乘37/13 -
13131313/37373737乘37/13=1
37373737/13131313÷13/37 =(37×1010101)(13×1010101)×37/13 =37/13×37/13 =1369/169 =169分之1369
13131313/37373737乘37/13=1
37373737/13131313÷13/37 =(37×1010101)(13×1010101)×37/13 =37/13×37/13 =1369/169 =169分之1369