Помогите (1/4:4+3/16)*(20целых5/8:5целых1/2+1/4) напишите решение

[latex]( \frac{1}{4} :4 + \frac{3}{16} ) * (20 \frac{5}{8} : 5 \frac{1}{2} + \frac{1}{4} ) =1\\ \\ 1) \frac{1}{4} : 4 = \frac{1}{4} * \frac{1}{4} = \frac{1}{16} \\ \\ 2) \frac{1}{16} + \frac{3}{16} = \frac{4}{16} = \frac{1}{4} \\ \\ 3) 20 \frac{5}{8} : 5 \frac{1}{2} = \frac{20*8+5}{8} : \frac{5*2+1}{2}= \frac{165}{8} * \frac{2}{11} = \frac{15*1}{4*1} = \frac{15}{4}=3 \frac{3}{4} \\ \\ 4)3 \frac{3}{4} + \frac{1}{4} =4 \\ \\ 5) 4 * \frac{1}{4} = \frac{4}{4} =1[/latex]