$\begin{array}{c}12345:15=823\\ \underset{‾}{-120}\\ 34\\ \underset{‾}{-30}\\ 45\\ \underset{‾}{-45}\\ 0\end{array}\backslash def\backslash arraystretch\{1.25\}\; \backslash begin\{array\}\{l\}\backslash ,\backslash ,\; \backslash ,\backslash ,\; 12345\; :\; 15\; =\; 823\; \backslash \backslash \backslash underline\{-120\}\backslash \backslash \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,3\backslash color\{\#ff6600\}\{4\}\; \backslash \backslash \; \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\; \backslash underline\{-30\}\; \backslash \backslash \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\; \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,4\backslash color\{\#ff6600\}\{5\}\; \backslash \backslash \backslash ,\; \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash underline\{-45\}\; \backslash \backslash \backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,\backslash ,0\backslash end\{array\}$