4 divided by 84 in log div = 0.047619047619047616
0.0476
21
84
21
use order of operations (multiplication & division left to right then addition) 135
4.2
12
21
4
"Sum" indicates addition, "into" indicates division. I'm guessing you meant division. If so, use "quotient," "answer" or "result." 4 goes into 84 21 times.
4.4286
3