Помогите с математикой 1 1/7*2*4/5*3/4 3 3/4*5/12*8/15 1 5/6*8 2/11*4/9 2 1/27*3 1/5*7...

1) $1 \frac{1}{7}*2* \frac{4}{5}* \frac{3}{4}=1 \frac{1*2}{7}* \frac{16}{20}* \frac{15}{20}=1 \frac{2}{7} * \frac{240}{20}= 1 \frac{2}{7}*12=1 \frac{2*12}{7}=1 \frac{24}{7}=4 \frac{3}{7}$
2) $3 \frac{3}{4}* \frac{5}{12}* \frac{8}{15}=3 \frac{3}{4}*( \frac{5}{12}* \frac{8}{15})=3 \frac{3}{4}*( \frac{30}{60}* \frac{48}{60})=3 \frac{3}{4}* \frac{24}{60}=3 \frac{3*24}{4*60}=3 \frac{6}{20}$