$${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{10}}}{{\mathtt{4.1}}}} = {\frac{{\mathtt{469}}}{{\mathtt{41}}}} = {\mathtt{11.439\: \!024\: \!390\: \!243\: \!902\: \!4}}$$
$${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}} = {\mathtt{21}} = \tiny\text{Error: }$$
hi
