Division Tricks (1)

Relevant wiki: Mental Math Tricks

By the Mental Math Trick wiki, we have this solution: $93/4=23~remainder~1$ $[10(1)+23]/4=8~remainder~1$ $[10(1)+8]/4=4~remainder~2$ $[10(2)+4]/4=6~remainder~0$ $[10(0)+6]/4=1~remainder~2$ $[10(2)+1]/4=5~remainder~1$ So the answer till 5 decimal place: $\frac{23}{10}+\frac{8}{100}+\frac{4}{1000}+\frac{6}{10000}+\frac{1}{100000}+\frac{5}{1000000}=\Large 2.38461\color{#D61F06}{5}=\huge \color{#EC7300}{\boxed{\color{#20A900}{2.38462}}}$