5/7*0,8*3,54______________  =2,5*26*1 3/49* 4/78

[latex] \frac{ \frac{5}{7} *0,8*3,54}{2,5*26*1 \frac{3}{49} * \frac{4}{78} } = \frac{ \frac{5}{7}* \frac{4}{5}* \frac{327}{100} }{ \frac{5}{2} *26* \frac{52}{49} * \frac{4}{78} } = \frac{5*4*327*2*49*78}{7*5*100*5*26*52*4}= \frac{327*7*3}{100*5*26}= \frac{6867}{13000} [/latex]