You should use your calculator for such simple sums. It is far quicker and involves fewer key depressions. I could tell you that the answer is 218.5 but how can you be sure that I did not make a mistake? Or that I am not messing about?
874
24.2778
51.4118
41.619
85.1098
218.5 x 4 = 874
38
23
0.0057
39.7273
38
4