206.8
× .42
Ignore the decimals
2068 * 42
86856
there are 3 numbers to the right of the decimal in the original problem
put 3 numbers to the right of the decimal in the answer
86.856
2068 * 2 = 4136
2068*40=82720
add
82720
+4136
------------
86856
now add the decimals
86.856
