9.75 square millimetres.
39 / 4 = 9.75
1.5
39
156 ÷ 4 = 39
507 divided by 39 is 13.
19 divided by 39 = 0.48717948717948717
39 divided 3 = 13
0.0741
44 minus the square root of 4 divided by point 4
39
15000 ÷ 12 ÷ 39 = (15000 ÷ 12) ÷ 39 = 322/39 ≈ 32.05
0.0044