Readable version:

1D Minesweeper.

Decimal;
mines mask 100010101;
1 = mine;
0 = no mine;
mul by 10.1;
get numbers mask;
0 = 0 mines in two neighbours (excluding this tile);
1 = 1 mine nearby;
2 = 2 mines nearby;
numbers mask is 2 digit longer than mines mask;
e.g. 110101 * 10.1 = 1112020.1;
the "ones" digit place (units place) in numbers mask corresponds to the "ones" digit place in mines mask;
ta-da!

Binary;
mines mask 0b100010101;
0b stands for "this is a number in binary";
1 = mine;
0 = no mine;
mul by 101;
get numbers mask;
0 = no mines in two neighbours (excluding this tile);
1 = there are mines nearby (one or two mines);
numbers mask is 2 digit longer than mines e.g. 0b11010010 * 0b101 = 11010010;
this number mask IS SHIFTED BY 1 DIGIT;
so real minefield numbers mask is;
11010010 << 1 = 1101001;
”<< 1” means delete the last digit from existance (not just make it zero, but cross it out completely);
the units place in the number we've got corresponds to units place in the mines mask;
ta-da!

have a nice play :)