287/13 = 22.076923 recurring (that is, 22.076923076923...)
A current of 287 microamps, which is 0.000287 amps.
Chlorine
3000 divided by 240 approx 13 amps?
OJ 287 was discovered in 1968 as a radio source by the Ohio State University Radio Telescope. It was later recognized as an active variable source in radio and optical bands in the early 1970's.
The Earth's crust
287 divided 7 = 41
47.8333
410
287
7.9722
7.175
260.9091
6.3778
14.35
5.5296
41
13.0455