You should use your calculator for such simple sums. It is far quicker and involves fewer key depressions than posting the question on WA. But since you seem unable to carry out even this simple task, the answer is 57.2
57.2
11
31.7778
0.0315
7.15
286
8.4118
35.75
260
7.9444
35.75
The answer is 286, i.e. 858 / 3 = 286.