Помогите пж прошу вас срочно надо очень

Решите задачу:

$\frac{1.3*0.45*7.2}{1.5*1.2*0.65}= \frac{1.3*1.5*0.3*1.2*6}{1.5*1.2*1.3*5}= \frac{0.3*6}{5}=0.36 \\ \\ \frac{1.7*4.5*6.9*1.1}{0.23*6.8*0.9*5.5}= \frac{1.7*0.9*5*0.23*3*1.1}{0.23*1.7*4*0.9*1.1*5}= \frac{3}{4}=0.75 \\ \\ \frac{0.25*3.6*0.76}{0.45*0.19*0.5}= \frac{5*0.5*3*0.12*0.19*4}{3*5*0.03*0.19*0.5}= \frac{0.12*4}{0.3} = \frac{0.03*4*4}{0.03}=4*4=16 \\ \\ \frac{0.25*18.6*4.2*5.7}{1.9*1.26*3.1*0.5}= \frac{5*0.5*3.1*6*2*2.1*1.9*3}{1.9*2*2.1*0.3*3.1*0.5}= \frac{5*6*3}{0.3}=\frac{5*6*0.3*10}{0.3}=300$